Abstract: A time display device (“TDD”)—equally adaptable to watches, clocks, computers, phones, and vehicles—indicates the current hour of the day by displaying a color that refers an observer to the disclosed color-to-hour matrix, thereby eliminating the traditional hour hand or digit altogether. Alternately adaptable to months, the system may be used with both mechanical and electronic displays. Various disclosed minute indicators provide minute indication by shape, complexity, company logo, air bubbles, or other novel methods. Environmental sensors allow switching between functions. TDD appearance is user-customizable via Internet. Birthstones, gemstones, and precious metals are alternately used as stand-alone time indicators.

Abstract: A method and apparatus for displaying time, the day sequence for the beginning and ending of twilight, sunrise and sunset in pie-shaped section on a circular clock face. A corresponding day sequence is retrieved from a memory and presented on a circular clock face in pie-shaped sections that represent twilight, day and night for a particular coordinate position and calendar date.

Abstract: A wearable electronic device for conveying information in an analog manner at least in part by the use of at least one display hand positioned on the dial side of a dial, wherein the wearable electronic device uses the display hand(s) to convey information that is stored in the controller of the device and/or provided by sensors and/or an external transmitter. An actuation mechanism, preferably a stepper motor, is used to rotate the display hands in the clockwise and/or counterclockwise directions in predefined increments to convey the information.

Abstract: A timing device includes a time display section and a drive unit. The time display section has a dial with a measurement indicator from a zero time position to a maximum measurable time position, and pointers capable of rotating above the dial in a fan-shaped trajectory. The drive unit drives the pointers above the dial from the zero time position to the maximum measurable time position, and stops the pointers above an extra display section in a position past the maximum measurable time after the maximum measurable time has passed.

Abstract: A wrist watch that also has a pager function incorporated into it. The wrist watch comprises a flexible band and with a watch unit attached to the flexible band. The watch unit displays the time manually, while a LCD readout located on the flexible band displays the time electronically. The wrist watch also includes an incorporated receiver which can receive pages from pager units, with any message, numerical or otherwise, being viewable on the LCD readout. A mode button allows an individual to choose between viewing the time and viewing a received paged message on the LCD readout. The wrist watch also includes an incorporated LED indicator light that indicates if a page has been received.

Abstract: A clock assembly (10) having a removable central clock mechanism (12) with time indicating hands (18, 20, 21) is adapted to be mounted on a flat vertical surface (26) with and separate removable hour disks (14) having numerals (34) connected to hanger elements (36) adapted to be mounted on the vertical surface around the central clock mechanism in correct positions to tell time. Doll clothes (40) are selectively hung on or removed from the hanger elements behind the numerals.

Abstract: The present invention is directed to a novelty item and kit comprising timepiece housing, timepiece face, timepiece hand element and images depicting a combination of morphed and non-morphed images.

Abstract: Disclosed is an analogue chronograph comprising a digital display. The digital display contains an hour and/or minute indicator using numbers. The latter are arranged on individual circular tracks and under a viewing window, form the hour and/or minute indicator in a digital manner. The minute indicator, in particular, can be sub-divided into decimal and unit positions. The chronograph enables the elapsed time to be easily read, even when subjected to strong vibrations, or when the wearer of the chronograph can only glance at the face. The hour indicator has, in addition to numbers 0 to e.g. 9, a symbol similar to a flag, in order to indicate that the limit of the validity range of the time measurement has been reached.

Abstract: There is provided a multifunction timepiece wherein the visibility of pointers can be improved, and increases in the thickness of the timepiece can be reduced. This timepiece includes a dial, an hour hand, a minute hand, a pointer, and a movement. The dial has a dial cover and a time display section on the inner periphery thereof. The hour hand is mounted on the time display section and has an hour hand rotating shaft disposed at a different position from the center position of the time display section. The minute hand is mounted on the time display section and has a minute hand rotating shaft disposed at a different position from the center position of the time display section. The pointer is mounted on the time display section and has a pointer rotating shaft. The dimension A from the pointer rotating shaft to the tip of the pointer is greater than the dimension B from the minute hand rotating shaft to the tip of the minute hand.

Abstract: The invention relates to an improved interactive television having a timer. The timer alerts a television viewer of the expiration of preset timers. For example, the preset timers may be associated with events not traditionally related to television content, such as a kitchen timer. The exemplary kitchen timer can alert a television viewer that a baking time has expired. Thus, the timer can manage alerts in a non-intrusive manner to enhance the viewer's experience.

Abstract: A watch for displaying time in hours and hundredths of an hour. The watch includes a housing assembly being designed for being worn by the user. A timing assembly is positioned in the housing assembly and operationally coupled to a power supply. The power supply supplies power the timing assembly. The timing assembly is designed for providing a pulse every second when the power supply supplies power to the timing assembly. A processing assembly is positioned in the housing assembly. The processing assembly is operationally coupled to the power supply for supplying power to the processing assembly. The processing assembly is operationally coupled to the timing assembly to receive the pulse from the timing assembly and process the pulse into a time to be displayed on a display member operationally coupled to the processing assembly. The processing member displays minutes calculated by the processing assembly in hundredths of an hour.

Abstract: The present invention relates to a timepiece device, and more particularly to a timepiece device having a customized dial. The timepiece device has a housing and a face plate attached to the housing. The face plate has a peripheral rim which has a plurality of intermittently spaced lands. Each land is configured to provide a surface for receiving customized indicia. An outer cover which can be removed or opened to provide access to customize the face plate is provided.

Abstract: A watch frame comprising a dial face having a circumferential boundary surrounding the dial face. A single series of hours indicia are arranged along and following the circumferential boundary and surrounding an interior region of the dial face. A first and second time movement, each including respective hour and minute handles are arranged in spaced relationship to each other with the hours and minute handles or each movement operating in conjunction with said single series of hours indicia. A first three stem arrangement coupled to and controlling the first time movement and a second three stem arrangement coupled to and controlling the second time movement having a polygonal shape to compliment that of the watch face.

Abstract: The present invention concerns the field of watches and time pieces. There is disclosed a mechanism for a watch (10) configured so that heartbeats act as the trigger that initiates updating of a second unit display. There is also described a mechanism for a watch adapted so that a heartbeat acts as a trigger to increment the time display (21). Furthermore there is disclosed a watch which is associated with a heartbeat sensor (30), the watch being adapted to periodically update a time display in response to heartbeats detected by the sensor, whereby the time display is updated every time a heartbeat is sensed.

Abstract: An adjustable watch crystal apparatus includes a watch body, a flexible lens having a changeable amount of curvature, and means for adjusting the amount of curvature of the flexible lens. The flexible lens is positioned upwardly adjacent a watch face for adjustably refracting light to make the watch face legible for a user with farsighted vision. The flexible lens includes top and bottom sides having convex configurations, an outer edge, and a center. The adjusting means includes a collar member attached to the watch body for retaining the flexible lens outer edge. In one embodiment, an adjustment screw controls the curvature of the flexible lens by moving the flexible lens center between adjacent-center and displaced-center configurations. In another embodiment, the collar member moves perpendicularly to the watch face to control the curvature of the flexible lens by moving the flexible lens outer edge between displaced-edge and adjacent-edge configurations.

Abstract: A tactilely readable timepiece with a clock device that keeps time. The display comprises a display area and at least one moveable portion within the display. The moveable portion is moveable with respect to the display to form at least one displayed character that is recognizable by touch by a user and has a tactilely sensible shape that is independent of a system of dots. An actuator operably associates the clock device of the moveable portion for displacing and positioning the moveable portion to form the displayed character depending on the current time kept by the clock device.

Abstract: A time display device (“TDD”)—equally adaptable to watches, clocks, computers, phones, and vehicles—indicates the current hour of the day by displaying a color that refers an observer to the disclosed color-to-hour matrix, thereby eliminating the traditional hour hand or digit altogether. Alternately adaptable to months, the system may be used with both mechanical and electronic displays. Various disclosed minute indicators provide minute indication by shape, complexity, company logo, air bubbles, or other novel methods. Environmental sensors allow switching between functions. TDD appearance is user-customizable via Internet. Birthstones, gemstones, and precious metals are alternately used as stand-alone time indicators.

Abstract: A wearable electronic device for conveying information in an analog manner at least in part by the use of at least one display hand positioned on the dial side of a dial, and a rotatable ring positioned on the opposite side of the dial, wherein the wearable electronic device uses the coordination of the display hand(s) and the ring to convey information that is stored in the controller of the device and/or provided by sensors and/or an external transmitter. An actuation mechanism, preferably a stepper motor, is used to rotate the display hand and ring in the clockwise and/or counterclockwise directions in predefined increments to convey the information. In the preferred embodiment, the wearable multimode electronic device is a wristwatch.

Abstract: The invention is an informational clock, wherein the clock displays information correlating to time displayed on the clock. Information is also varied by a randomizer, wherein a specific entry of information in a database, within an array selected to correlate with the time, is determined at random. Database information can be downloaded and be thematically-based.

Abstract: A method of enabling the displayability of at least one hidden mode in a multimode electronic device, wherein the method comprises the steps of determining that data in the at least one hidden mode satisfies a specified condition; and causing the mode indicator of the hidden mode to be displayable during a step of cycling among the viewable modes; wherein the at least one hidden mode is available for selecting from the viewable modes in the mode selecting mode. An electronic device that can carry out the foregoing methodology is also provided. In a preferred embodiment, the electronic device is a timepiece and specifically, a wristwatch.

Abstract: A clock with a seemingly gravity-defying time-indicating element adjacent a substantially vertically disposed dial comprises a magnetic guide element positioned behind the dial for movement around the dial as a function of time, and a magnetically responsive time-indicating element such as a metallic-appearing sphere positioned for viewer visibility in front of the dial. The time-indicating element is magnetically coupled to the guide element for movement therewith around the front of the dial in apparent defiance of gravity to indicate the time without becoming decoupled from the guide element.

Abstract: The invention concerns a method and an electronic device for recognizing characters traced manually on an input zone (10) comprising a plurality of sensors (15) each capable of being activated by a finger or a tracing instrument (13). The method consists in comparing the manual trace of a character (100) produced on the input zone with a group of characters of a predetermined set of characters. The invention is characterised in that each character of the set of characters is represented by at least one predetermined model representative of a way in which the character can be traced, and in that a model representative of the way in which the manual trace of the character (100) has been performed on the input zone is elaborated.

Abstract: A device and method for displaying variable data comprises: logic for displaying a gauge that comprises a closed two-dimensional shape. The two-dimensional shape comprises a linear pointer inside the shape, the location of the pointer being determined as a function of a change in an item of data during a predetermined time interval. A device and method for displaying variable data comprises: logic for displaying an annular graph representing changes in a quantifiable item of data during a predetermined time interval, wherein the annular graph is positioned around a clock face. A computer program product comprises instructions for: displaying a graphical representation of variable data comprising displaying a gauge; and also for: displaying an annular graph representing changes in a quantifiable item of data during a predetermined time interval, wherein the annular graph is positioned around a clock face.

Abstract: An electronic timepiece has a computer for controlling operation of the electronic timepiece. The computer stores in a storage medium data inputted by a user using functions of the electronic timepiece. A display time of the data is switched by the computer in accordance with an amount of the data stored in the storage medium. The computer then displays the data on a screen of the electronic timepiece by successively switching display of the data in accordance with the switched display time.

Abstract: A timepiece having a display for displaying a digit provided on a ring which itself has a plurality of digits provided thereon, wherein the timepiece comprises an integrated circuit operable in at least (i) a date display mode and (ii) a counting mode; a gearing assembly comprising one or more wheels, being meshingly coupled to the ring so that the rotation of the one or more wheels causes the rotation of the ring; a motor, the motor rotateably coupled to the at least one or more wheels of the gearing assembly, wherein the motor has a rotatable member such that the rotation thereof causes the ring to rotate; and mode selecting means for selecting between at least the date display mode and the counting mode; wherein when in the date display mode the ring rotates at a first rate and when in the counting mode the ring rotates at a second rate different from the first rate.

Abstract: The invention relates to a clock comprising a clock face with hands and clockwork elements. Said clock face comprises a non-rotationally symmetric surface in the direction of rotation of the hands. The inner ends of the hands are rotatably mounted in a displaceable manner around a pivoting axis which extends in a peripheral manner with respect to the peripheral rotational axis of the hands and in a perpendicular manner with respect to the longitudinal axis of the hands. A control element is provided, enabling the hands to be pivoted in such a way that they can be displaced at an equal distance from the surface of the clock face as they go round.

Abstract: A display device for displaying an event and method for monitoring and displaying a time interval related to a non-displayed past event and/or a non-displayed future event. A displayed event of a person or event is displayed on a support member, such as a frame or plaque. A timer is provided to calculate an accumulating time interval and/or a reducing time interval. The accumulating time interval measures the current elapsed time from a non-displayed past event. The reducing time interval measures the time remaining from a current time to a non-displayed future event. The time intervals are displayed on a timer display that is disposed adjacent the displayed event to remind an observer of the time to a non-displayed future event and/or of the time from a non-displayed past event.

Abstract: A typical mirror combined with digital clock for reading time while simultaneously looking in the mirror. To attain this, the clock, which is mounted behind the mirror, has a plurality of display devices for reading hours and minutes aligned with apertures in the black template and reflective surface of the mirror. These display devices can be light emitting diodes, liquid crystal devices, electro-luminescent displays, illuminated apertures, or other type display technology. The digital clock can be powered either by battery or from a 110-volt power source. As a product, the combinational mirror and clock can be decorative to brighten up a room. The digital clock display can have various appearances depending on the placement of the hour and minute display devices. In addition to the numeric clock display devices, an alphanumeric device can also be added for displaying various messages.

Abstract: An analog chronograph timepiece has a main plate and a setting stem for correcting time information. Defined at the main plate are a reference vertical axis line passing through the rotational center of the main plate and disposed parallel to a central axis line of the setting stem, and a reference horizontal axis line passing through the rotational center of the main plate and disposed orthogonal to the main plate reference vertical axis line. The main plate has regions disposed relative to the reference vertical and horizontal lines and in which a time coil block and first and second chronograph coil blocks are selectively arranged.

Abstract: An electronic unit that is permitted to undergo operation control on the basis of a timer reservation set by a user includes a setting section for setting a time designated by the user, an operation control section for controlling the operation of the electronic unit in accordance with time set by the setting section, a display section for displaying an operation portion for operating the electronic unit, a display control section such that when the electronic unit is operative in accordance with the operation control section, it controls the display section so that a specific display is carried out on the display section, and a designation detecting section for detecting a designation of the user with respect to the specific display, whereby when a designation of the user is detected by the designation detecting section, the operation control section conducts a control to neglect the time set by the setting section and to continue the operation of the electronic unit when the designation of the user is detec

Abstract: A watch face uses liquid crystal displays along with a reflective polarizer to produce backgrounds with selective appearances. Therein, the watch employs a polarizer to produce polarized light that is passed downward to a liquid crystal display. The liquid crystal display selectively rotates or does not rotate the polarized light. If the light is rotated, a reflective polarizer layer located beneath the liquid crystal display reflects the rotated light back upward off its surface to provide the watch face with a first color. If the light is not rotated, then the light is transmitted through the reflective polarizer layer to a reflective dial surface disposed beneath. The light is then reflected off the dial surface to provide the watch face with a second color.

Abstract: A method for indicating that a wearable electronic device is operating in a selected mode, wherein the wearable electronic device comprises at least one hand operatively coupled to an actuation mechanism. The method comprises the steps of (a) moving the hand from a first position to a second position, wherein the movement of the hand is through a predetermined sweep angle; (b) moving the hand from the second position back to the first position through the predetermined sweep angle; and (c) repeating at least step (a) and if necessary, repeating step (b); whereby the hand oscillates between the first position and the second position while the wearable electronic device is operating in the selected mode. A wearable electronic device that comprises the foregoing methodology is also provided.

Abstract: An educational audio visual clock having an image window adjacent each numeral on the clock face to show the images of twelve Presidents of the United States at any given time. Images are on an image plate behind the clock face and display the images of the first twelve presidents from midnight until noon wherein the image plate is rotated to reveal the images of the second twelve Presidents of the United States for the next twelve hours, at which point the image wheel returns to its original position. At the top of each hour an LED illuminates the corresponding presidential image and an audio device plays an audio clip related to that president.

Abstract: A combination clock radio, weather station and message organizer includes a base unit having a visual display, a controller located in the base unit including a central processor for controlling operation of the combination, and a temperature sensor for obtaining outdoor temperature readings, the temperature sensor being in communication with the controller. The controller is adapted to present a hue on the visual display that is a function of the outdoor temperature reading. The combination may also include a pressure sensor in communication with the controller for monitoring a rate of change in atmospheric pressure and providing a weather forecast animation that is a function of the changes in the atmospheric pressure.

Abstract: An electronic timepiece has an operating unit for switching between a time display mode and a demo display mode, a time measuring unit for measuring time, and a storing unit for storing a timing condition for switching between the time display mode and the demo display mode. A control unit outputs a time display signal representing time measured by the time measuring unit when the operating unit switches to the time display mode, outputs a demo display signal when the operating unit switches to the demo display mode, and outputs the demo display signal after outputting the time display signal for a preselected period of time when the time measured by the time measuring unit satisfies the timing condition stored by the storing unit.

Abstract: The timepiece comprises a body forming a case inside which is accommodated a clockwork-movement. This body comprises an upper case (1), which has a front face having first display means (16), and a lower case (2), which has a front face having second display means (26). One of the cases is mounted pivoting on the other about a pivoting axis (X) substantially perpendicular to the general plane of the cases and can occupy a closed position, in which the upper case is superposed on the lower case, and an open position, in which the upper case has pivoted sideways and lets the second display means (26) be seen. The clockwork-movement comprises respective portions (100, 200), accommodated in the upper and lower cases to drive the first and second display means, and a drive mechanism (5) ensuring a kinematic link between the two portions of the clockwork-movement. This kinematic link is interrupted when the cases are put in the open position.

Abstract: Watch movement with hand display, comprising mobile elements (44, 42), designed to receive the hour (16) and minute (20) hands indicating current time, mounted pivoting to pivot about a first axis (A—A) arranged substantially at the center of the movement and four mobile elements (58b, 60b, 64b, 62b) designed to receive hands displaying complementary functions. According to the invention, the four mobile elements (58b, 60b, 64b, 62b) are mounted pivoting on the movement about second (B—B), third (C—C), fourth (ND) and fifth (E—E) axes arranged on a straight line (X—X) perpendicular to them.

Abstract: A timepiece, such as a watch, has a plurality of concentric rotating bands, viewable from both above and from the side so that a viewer may read the time without changing the orientation of the timepiece. The timepiece has an attachment mechanism that permits the removable attachment of objects, such as sculptures or other ornamental pieces to the surface of the timepiece.

Abstract: The device for displaying time in selectable display patterns includes a storage device, an interface, a housing, display elements, and a controller. The storage device stores selectable display patterns. The interface receives an input to select a display pattern. The housing contains a display area that displays the selected display pattern. The display elements may include hour display elements, minute display elements, second display elements, day display elements, date display elements, and/or month display elements. Time is displayed by the amount of display elements in the exhibiting state.

Abstract: The invention concerns a timepiece comprising a mainspring with constant torque, having a balance spring and a balance wheel, the balance wheel (7) oscillation being maintained through an escapement mobile element (2) by moving a fixation point of the balance spring (6) when the oscillator passes through the oscillator impulse point, bringing about a circular motion of said balance spring (6) fixation point about the oscillator, thereby driving in rotation in time the mainspring-escapement assembly (2,6,7).

Abstract: A display device for watches, comprising a watch dial provided with a day hours display window for displaying a respective one of the hours of the day during daytime and with a separate night hours display window for displaying a respective one of the hours of the night during nighttime. The display device for watches comprises a day hours disc provided with twelve hour numbers and a night hours disc provided with twelve hour numbers. The two hour display windows and the two hour discs are arranged such that the hour numbers of the day hours disc are visible only in the day hours display window, and the hour numbers of the night hours disc are visible only in the night hours display window. By using two separate hour discs and two separate hour display windows for displaying the day hours and for displaying the night hours, respectively, hour number representations on the one hand can be larger than when using a single hour display window and a single 24-hour disc.

Abstract: A habit cessation aide includes a timer to determine the interval between starting a habitual act, a display for displaying messages in operative connection to the timer, and a strap for securing to a user's body. A widely held habit is smoking, for which the illustrated embodiment is directed towards. The habit cessation device also includes an alarm, which may be auditory, vibratory, or a combination. As shown, the device is in the form of a wristwatch and also functions as a standard wristwatch and includes features such as calculating and displaying items including at least time, date, and elapsed time. Depending upon the frequency of cigarette smoking, signaled by the push of a specialized button, different messages are displayed, such as encouraging, statistical or informational, to help the user quit the habit.

Abstract: An organic EL panel has a cover glass as one of the components thereof. In the organic EL panel, more specifically, the cover glass, an anode, a luminescent organic layer, a cathode, a sealant, and a sealing substrate are disposed, in that order in the downward direction, to form a transparent panel.

Abstract: There is provided a multifunction timepiece wherein the visibility of pointers can be improved, and increases in the thickness of the timepiece can be reduced. This timepiece includes a dial, an hour hand, a minute hand, a pointer, and a movement. The dial has a dial cover and a time display section on the inner periphery thereof. The hour hand is mounted on the time display section and has an hour hand rotating shaft disposed at a different position from the center position of the time display section. The minute hand is mounted on the time display section and has a minute hand rotating shaft disposed at a different position from the center position of the time display section. The pointer is mounted on the time display section and has a pointer rotating shaft. The dimension A from the pointer rotating shaft to the tip of the pointer is greater than the dimension B from the minute hand rotating shaft to the tip of the minute hand.

Abstract: A decorative clock comprising a ferrous (magnetic) base plate, a battery operated clock mechanism and decorative designs which may be in the form of a sheet containing a plurality of individual flexible permanent magnets is disclosed. Each individual flexible permanent magnet has an artistic design or feature thereon and can be magnetically attached to the front surface of the base plate so as to create an overall design. The number of overall designs that can be created by the selective placement of the individual permanent magnets on the base plate is virtually limitless. The individual permanent magnets can be readily changed and/or moved relative to one another so as to readily change the overall design on the base plate.

Abstract: A display face is created by cutting or slicing a bowling ball wherein a portion of a weight block or core center of the bowling ball is displayed. The weight block or core is different in different balls. Accordingly, a slice of the bowling ball with the weight block therein creates a novel or unique appearance on the display face. The unique display face may be provided with clock hands and indicia representing clock numerals mounted in front of the bowling ball slice. Alternatively, the bowling ball slice may be utilized as a plaque on which an award plate is mounted or on which indicia are engraved. The display face may not contain a portion of the weight block or center core where slices taken from the periphery of the bowling ball or taken from a bowling ball without a weight block or center core. Additionally, the bowling ball may be provided with a fragrance to create a scent, and this fragrance a scent may also be associated with the display face.

Abstract: A novelty clock having a display comprised of replica pool balls. The clock is contained primarily within a housing having a front panel defining a time display opening through which the balls are passed. The balls are displayed on a shelf that is hinged to the front panel of the clock. The shelf is pivoted upwardly to withdraw the balls and is then lowered to return the balls the most forward position. Three carousels are provided for displaying one minute, ten minute and one hour increments of time. An array of ball receiving cells are defined by each carousel. A time display control mechanism is provided for moving at least the first carousel through a rotation of 36° each minute. The mechanism includes primarily a timing device, a motor, and a drive mechanism. At one minute intervals, the timing device actuates the motor. The motor is mounted on a bottom panel of the housing and includes an output shaft to which the drive mechanism is connected.

Abstract: A night-light is configured to emulate a traffic signal and thereby train a child to remain in bed during a predetermined interval. In accordance with one embodiment of the present invention, a night-light comprises a housing having a first light emitter (e.g., a red light source), a second light emitter (e.g., a green light source), a controller electrically coupled to the first light emitter and the second light emitter, and a timer interface electrically coupled to the controller, wherein the controller is configured to operate in a first, second, and a third mode. In general, the first mode corresponds to the first light emitter being activated (“bed-time” mode), the second mode corresponds to the second light emitter being activated (“wake-time” mode), and the third mode corresponds to the case where neither the first or second light emitters are activated (“off” mode).

Abstract: A traffic signal includes a micro-controller in communication with a switching system. The micro-controller executes a process for controlling a signal indicator according to a selected signal cycle. First and second actuators communicate with the corresponding first and second input terminals of the micro-controller. The first actuator causes the micro-controller to execute a first signal cycle. The second actuator causes the micro-controller to execute a second signal cycle.

Abstract: A method and a device (100) for displaying appointments includes: displaying an analog clock face (202) divided into a plurality of time regions, such as twelve hour intervals, on the display (109); associating time regions, such as the twelve hour intervals with appointments; and marking the associated time regions (204, 206, 208) thereby visually indicating appointments. In one embodiment, marking includes using one or more of pattern, color, hue, gray scale, and image features.