Patents Represented by Attorney David W. Wong
  • Patent number: 6918491
    Abstract: A display stand has supporting base which is self-erecting by a pivotal board located within the base. The pivotal board is biased by an elastic cord and is pivotable between a horizontal position transverse to the base and a vertical downward position at which it is juxtaposed to the front panel of the base. The pivotal board is engageable with a horizontal slot opening formed in the rear panel of the base for maintaining the base in the erected condition. The side panels of the base are also foldable inwards along two vertical fold lines formed in the middle therein. A second elastic cord is connected between these fold lines so that it would pull the side panels to fold inwards at the vertical fold lines when the pivotal board is pulled downwards to disengage from the horizontal slot opening. A display tray is disposable in a forward sloping position on the base and the base in the collapsed folded condition may be placed within the tray for shipping, transporting, or storage.
    Type: Grant
    Filed: July 10, 2003
    Date of Patent: July 19, 2005
    Inventors: Geoffrey Alan Moss, David Brian Minister
  • Patent number: 6897573
    Abstract: A manually operated voltage generating device provides an electrical voltage for operating an electronic unit such as a remote control handheld unit. The device has a permanent magnet mounted in a horizontal manner at the underside of a mild steel plate. The magnet is normally located in a spaced manner from the central post of an E-shaped core. A winding is wound on the central post. A compression spring mounted over the core maintains the magnet normally spaced above the core. The mild steel plate is operative in an up and down manner against the spring force of the spring to move the magnet in a reciprocating movement relative to the core so as to generate a current in the winding. The current charges a capacitor, and the voltage across the capacitor provide the electrical voltage for operating the electronic unit.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: May 24, 2005
    Inventor: Reza H. Shah
  • Patent number: 6882594
    Abstract: The system repels noxious flying insects such as female mosquitos from an intended area by broadcasting a series of ultrasonic turbulence waves over the area. The turbulence waves have frequencies which are multiples of the wing beat speed of the insects. The ultrasonic waves are inaudible to humans or animals and they cause the wings of the insects to fluctuate and vibrate such that the insect avoid flying into the intended area.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: April 19, 2005
    Inventor: Robert David Troy Pujolas
  • Patent number: 6871750
    Abstract: A foldable display stand having three opened side shelves is formed by two stepped side panels, a front panel, and a rear panel which are formed from a single geometrical figure formed in a single sheet material. The stand is foldable into a collapsed condition relative to two vertical fold lines formed on the side panel and located opposite to one another. The front panel will abut the rear panel when the stand is folded in the collapsed condition. The shelves are formed by a plurality of panels formed in an upper extension to the front panel and the rear panel. These panels are foldable relative to horizontal fold lines to form the three shelves resting horizontally on stepped upper edges of the side panels. Open end slots are formed in a free end edge of end panels of the front panel and rear panel, which are engageable with upper edges of the side panels for latching the opened side shelves securely in the horizontal position.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: March 29, 2005
    Inventors: Geoffrey Alan Moss, David Brian Minister
  • Patent number: 6857552
    Abstract: A method and apparatus for soldering terminal ends of an antenna embedded in a plastic smart card to contact terminals of an IC module disposed on the card are shown. The enamel coated antenna terminal ends are pre-coated with solder with a heater having horizontal opening with melted solder retained therein. The solder pre-coated terminal ends are maintained in a secured contact with the terminal contacts of the IC module by heating coils mounted at a free front end of two pivotal elongated cantilever arms. A piece of predetermined amount of solder is dropped into the cavity of each heating coil, and the heating coils are actuated with a low electrical current to generate a concentrated intense heat to melt the piece of solder to form secure permanent solder joints between the terminal ends of the antenna to the contact terminals of the IC module.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: February 22, 2005
    Assignee: Intercard Limited
    Inventor: Chi Ming Wong
  • Patent number: 6838859
    Abstract: A device for increasing an extreme low voltage from a heat to electrical voltage thermopile is shown. The device has an oscillator including two MOSFET transistors coupled to a transformer having four bifilar windings wound on a core having a high permeability. The two transistors operate alternately to generate an intermediate voltage which is increased in magnitude by a voltage doubling and rectifying circuit to obtain the substantially constant operating output voltage. The output voltage is further maintain constant by a current control cirucit including an adjustable potentiometer adjustable to vary the current.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: January 4, 2005
    Inventor: Reza H. Shah
  • Patent number: 6796223
    Abstract: The machine is operable for continuously extracting moisture or dehydrating food. A plurality of food tray are insertable into a main chamber having an air diffuser mounted on one side and an air collector on the opposite side. Air is drawn through the chamber by a blower. Heat is applied to the food by heater element incorporated at the underside of the food trays. Dampers are located at the air inlet and air exhaust ducts, which may be monitored and adjusted by temperature and moisture sensors for maintaining a selected temperature and moisture condition to extract the moisture content of the food to a desirable condition. The processed food may be retrieved from the machine while a new tray of food is being placed into the chamber.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: September 28, 2004
    Inventor: Qi Fen Jiang
  • Patent number: 6793073
    Abstract: A window blind is mounted within a rectangular box having two opposite opened ends. The box has a longitudinal length shorter than the width of the window blind such that two end portions of the blind extend beyond the opened ends of the box respectively. Spacers are provided by tabs integrally formed on top and bottom panels of the box, which are foldable downward inwardly to locate between the slats and the head rail of the blind. The spacers press the slats and the head rail respectively tightly against the side panels of the box, and they also provide the required space for locating the end portions of the slats and the head rail in the cutting means of a trimming machine for trimming the window blind to a desirable width.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: September 21, 2004
    Inventor: Kevin Tien-Jen Tu
  • Patent number: 6608286
    Abstract: A continuous welding electrode suitable for short circuit welding is provided. The electrode has a continuous metal core with a welding flux material coated on its entire outer surface and circumscribing gaps are formed at regular interval over its entire length to expose a portion of the metal core. The gaps are adaptable for applying the welding current to the electrode in the welding operation. The melting temperature of the welding flux material is about 0.8 to 0.9 times the melting temperature of the metal core; and the unit weight of the welding flux material coating is about 0.37 to 0.48 times the unit weight of the metal core.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: August 19, 2003
    Inventor: Qi Fen Jiang
  • Patent number: 6553215
    Abstract: This system is for automatically controlling a radio receiver to provide an audible broadcast of the weather alert from weather stations. It may also be incorporated in a multi-band radio for automatically switching between AM/FM broadcast and weather alert broadcast. A scanning means operates continuously to tune the weather band portion of the receiver automatically in a stepping manner to receive signals from the weather stations regardless of whether the receiver is operating in any selected AM or FM broadcasting in the multi-band radio. A combination switching comparator and switching means automatically switch the system over to the weather broadcast when a weather alert signal is detected. The switching means also automatically switches the system back to the original selected broadcast after the termination of the weather alert broadcast.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: April 22, 2003
    Inventor: Kim-Por Chung
  • Patent number: 6507971
    Abstract: This toothbrush would operate normally only when the user brushes in a correct manner. It has a brush member slidably mounted to a handle. A latching arrangement is provided between the brush and the handle such that when the toothbrush is operated incorrectly in the direction along its longitudinal axis, the toothbrush would either slide freely in and out or completely detach from the handle rendering it inoperable. When brushing with the correct motion in the up and down direction perpendicular to its longitudinal axis, the latching arrangement would maintain the brush member securely mounted to the handle.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: January 21, 2003
    Inventor: Kwok-Kuen Sham
  • Patent number: 6508023
    Abstract: An easel is attachable to the rear surface of an image board to form a composite device. The easel maintains the latter in an upstanding position when erected. It is made of a single board material having a designed pattern stamped therein and having all the components which may be unfolded to form the easel. The erected easel has two mutually parallel vertical side panels and a plurality of horizontal transverse brace members which may be manually unfolded to support the easel in the erected position or tie members may be provided to retained the side panels and the transverse brace members in the unfolded position. The easel and the image board may be folded along a plurality of transverse lines to a compact package for ease in shipping and storage. The image board and the easel are self-erecting when elastic tie members are provided.
    Type: Grant
    Filed: February 6, 2001
    Date of Patent: January 21, 2003
    Inventors: Geoffrey Alan Moss, David Brian Minister
  • Patent number: 6459587
    Abstract: A modular support and casing is provided with a selected circuit breadboard and circuit testing module for circuit construction and testing. Electrical and electronic components may be removably and interchangeably mounted on the circuit breadboard for constructing an electrical or electronic circuit in circuit development. A plurality of selective side plates are slidably and securely mounted on the longitudinal side edge portions of the support base. Auxiliary components such as switches and connectors may be conveniently provided in pre-formed openings on these side plates for ease in the circuit construction. A top cover is provided to maintain the side plates securely in place. The side plates form the side panels of the cover to provide a complete enclosure for protecting the electrical or electronic circuit thus constructed.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: October 1, 2002
    Inventor: Eric K. D. Chan
  • Patent number: 6457201
    Abstract: This toothbrush would operate normally only when the user brushes in a correct manner. It has a brush member slidably mounted to a handle. A latching arrangement is provided between the brush and the handle such that when the toothbrush is operated incorrectly in the direction along its longitudinal axis, the toothbrush would either slide freely in and out or completely detach from the handle rendering it inoperable. When brushing with the correct motion in the up and down direction perpendicular to its longitudinal axis, the latching arrangement would maintain the brush member securely mounted to the handle.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: October 1, 2002
    Inventor: Kwok-Kuen Sham
  • Patent number: 6457398
    Abstract: The sheet music turning system has a stack of a plurality of rectangular transparent envelopes with their closed end attached to an elongated rod. An opened slot is formed at their opened edge or at two side edges close to the opened edge. The slots are formed in offset locations in alternate envelopes. The music sheets are mounted in the envelopes sequentially. The elongated rod is pivotally mounted in a horizontal position to a lower end of a forward leaning upper frame which has a sliding arm provided at its upper end or at the two sides. The sliding arm has a finger extending over the top edge portion or two fingers extending over the two side edge portions of the stack and being slidable between the offset locations of the opened slots to cause the first envelope to flip forward by gravitational force one page at a time to display the music sheets sequentially one page at a time.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: October 1, 2002
    Inventor: Man Tat Wong
  • Patent number: 6402161
    Abstract: A portable load transporting dolly having a mechanism manually operable for selectively ascending or descending steps is shown. The dolly has generally cross-shaped wheels and a pivotal driving lever is located at its handle. A cable couples the pivotal driving lever to the rotating shaft of the cross-shaped wheels through a plurality of pulleys and ratchet gears such that the wheels may be rotated easily by gripping the lever. The radial arms of the cross-shaped wheels have sliding reciprocative rods which react with the steps of the staircase to enhance the climbing action of the dolly on the staircase.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: June 11, 2002
    Inventor: George Baghdadi
  • Patent number: D475141
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: May 27, 2003
    Inventor: Derek Shin
  • Patent number: D490772
    Type: Grant
    Filed: August 11, 2003
    Date of Patent: June 1, 2004
    Inventor: Chun Bong Chu
  • Patent number: D492617
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: July 6, 2004
    Inventor: William Axworthy
  • Patent number: D493309
    Type: Grant
    Filed: November 4, 2003
    Date of Patent: July 27, 2004
    Inventors: Geoffrey Alan Moss, David Brian Minister