Patents by Inventor David Chu
David Chu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20060238776Abstract: A system for sensing an absolute position in two dimensions includes a target having a two-dimensional target pattern. A sensor captures an image of a first subset of the target pattern. A controller generates a first image vector representing summations of rows of pixel values from the image, and a second image vector representing summations of columns of pixel values from the image. The controller is configured to determine an absolute two-dimensional position of the first subset with respect to an origin of the target pattern based on the first and the second image vectors and a plurality of target vectors that represent the target pattern.Type: ApplicationFiled: April 22, 2005Publication date: October 26, 2006Inventors: David Chu, Evan Whitney
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Patent number: 7103355Abstract: A method and apparatus are disclosed that support multiple mobile address types using object-oriented programming techniques. A mobile address object class supports the creation of mobile address objects. The mobile address object class includes the test-and-branch code that supports each mobile address type. A CPA Mobile Address class allows mobile address information to be stored in CPAMA objects in a uniform manner. The CPA Mobile Address class provides the address retrieval functionality to map the stored mobile address information to a suitable format. The CPAMA class provides a set of constructors to create and initialize its data members using an appropriate format, such as an access channel format or an ANSI International Mobile Station Identifier format, and a set of destructors to de-initialize objects before they are destroyed. The address information can be extracted from a CPAMA object using a set of member functions.Type: GrantFiled: June 12, 2003Date of Patent: September 5, 2006Assignee: Lucent Technologies Inc.Inventors: Vishal Sham Chandnani, David Chu Hom
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Patent number: 7013944Abstract: A compact disk (DVD) manufacturing machine is used to laminate first and second DVD substrates to produce a DVD, and mainly includes a glue applicator for applying a glue ring on a laminating surface of each DVD substrate; a DVD laminator for turning the first DVD substrate to the second one at predetermined speeds, allowing the glue rings to contact with each other before the two DVD substrates are slowly laminated; and a rotating element below a fixed sucker of the DVD laminator for rotating the laminated DVD substrates and ensuring even spread of the glue between the two substrates without producing blisters. Since the gluing and the laminating are synchronously performed at two different positions on a turntable of the machine, an increased productivity may be obtained.Type: GrantFiled: March 10, 2004Date of Patent: March 21, 2006Assignee: Automation Design & Manufacturing Technology Co., Ltd.Inventor: David Chu
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Publication number: 20050261761Abstract: A temporary biocompatible stent and method for visceral anastomosis. The stent is provided with integral means for maintaining the structural stability of the stent while providing substantial flexibility. The method comprises fitting the luminal stumps of the viscus over either end of a stent of the invention, and joining the ends of each stump together. A short time after completion of the anastomosis, the stent dissolves and is absorbed safely into the body. The stent and method can be beneficially used in laparoscopic or more invasive traditional surgical procedures. The stent and method are particularly well suited for anastomosis of the bowel.Type: ApplicationFiled: July 29, 2005Publication date: November 24, 2005Applicant: City of HopeInventor: David Chu
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Publication number: 20050185193Abstract: A system and method for acquiring position information of a movable apparatus relevant to a specific axis is disclosed. In one embodiment, an interferometer generates first and second beams and various beam-steering members are located to define beam path segments for the two beams, but no beam path segment varies in length in unity with displacements of the movable apparatus along the specific axis. In another or the same embodiment, each beam path segment in which the first beam either impinges or has been reflected from the movable apparatus is symmetrical to a corresponding beam path segment of the second beam. The movable apparatus may be a wafer stage in which the “specific axis” is the exposure axis of a projection lens, but with all optical members which cooperate with the stage being located beyond the ranges of the wafer stage in directions perpendicular to the lithographic exposure axis.Type: ApplicationFiled: February 20, 2004Publication date: August 25, 2005Inventors: William Schluchter, Louis Mueller, Douglas Woolverton, Jeffrey Young, Alan Ray, David Chu
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Publication number: 20050175217Abstract: The position of a stage is determined. Images of a plurality of targets located on the stage are captured. The captured images of the plurality of targets are compared with stored images to determine displacement coordinates for each target. The displacement coordinates for the targets are translated into position coordinates for the stage.Type: ApplicationFiled: February 5, 2004Publication date: August 11, 2005Inventors: Louis Mueller, David Chu, Michael Brosnan, William Schluchter, Jeffrey Young, Alan Ray, Douglas Woolverton
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Publication number: 20050062624Abstract: A method of digitizing first and second signals in imperfect quadrature for obtaining characteristic parameters of the first signal comprises providing a first signal, the first signal comprising an inphase quasi-sinusoidal analog signal. The method comprises providing a second signal, the second signal comprising a quadrature signal. The method comprises digitizing the first signal at a sampling rate, thereby generating a first plurality of sets of digital signal waveform samples and digitizing the second signal at the sampling rate, thereby generating a second plurality of sets of digital signal waveform samples. The method comprises digitally processing successive first and second sets of digital signal waveform samples to generate continually updated digital characteristic parameters representing a characteristic behavior of the first signal.Type: ApplicationFiled: September 23, 2003Publication date: March 24, 2005Inventors: David Chu, Carol Courville, Lee Kalem
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Publication number: 20050019462Abstract: A device for transferring an image to a tongue includes a sheet of saliva-dissolvable material, and an image pattern formed on the sheet. The image pattern includes a coloration material, which interacts with saliva for leaving an image on the tongue.Type: ApplicationFiled: August 26, 2004Publication date: January 27, 2005Inventor: Ki Kwan (David) Chu
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Publication number: 20040177930Abstract: A compact disk (DVD) manufacturing machine is used to laminate first and second DVD substrates to produce a DVD, and mainly includes a glue applicator for applying a glue ring on a laminating surface of each DVD substrate; a DVD laminator for turning the first DVD substrate to the second one at predetermined speeds, allowing the glue rings to contact with each other before the two DVD substrates are slowly laminated; and a rotating element below a fixed sucker of the DVD laminator for rotating the laminated DVD substrates and ensuring even spread of the glue between the two substrates without producing blisters. Since the gluing and the laminating are synchronously performed at two different positions on a turntable of the machine, an increased productivity may be obtained.Type: ApplicationFiled: March 10, 2004Publication date: September 16, 2004Applicant: Automation Design & Manufacture Technology Co., Ltd.Inventor: David Chu
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Patent number: 6727826Abstract: A “try me” feature is disclosed for remotely controlled devices such as remotely controlled toys for point of sale demonstration or sampling. The disclosure describes a secondary link between the remote control device and the remotely controlled device. When the secondary link is selected or present, activation of a control on the remote control device will cause the remotely control device to react the same or similar to the way it reacts under wireless remote control, but via the secondary link. The secondary link may be configured as a disconnectable wired coupling. The remotely controlled device and the remote control device may be contained in a point of sale package or configured in a point of sale display.Type: GrantFiled: December 30, 1999Date of Patent: April 27, 2004Assignee: Toymax INCInventors: David Chu Ki Kwan, Steven Lebensfeld, Carmine Russo, Russell Javors
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Publication number: 20040071836Abstract: A device for transferring an image to a tongue includes a sheet of saliva-dissolvable material, and an image pattern formed on the sheet. The image pattern includes a coloration material, which interacts with saliva for leaving an image on the tongue.Type: ApplicationFiled: October 15, 2002Publication date: April 15, 2004Inventor: David Chu
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Publication number: 20030210675Abstract: A method and apparatus are disclosed that support multiple mobile address types using object-oriented programming techniques. A mobile address object class supports the creation of mobile address objects. The mobile address object class includes the test-and-branch code that supports each mobile address type. A CPA Mobile Address class allows mobile address information to be stored in CPAMA objects in a uniform manner. The CPA Mobile Address class provides the address retrieval functionality to map the stored mobile address information to a suitable format. The CPAMA class provides a set of constructors to create and initialize its data members using an appropriate format, such as an access channel format or an ANSI International Mobile Station Identifier format, and a set of destructors to de-initialize objects before they are destroyed. The address information can be extracted from a CPAMA object using a set of member functions.Type: ApplicationFiled: June 12, 2003Publication date: November 13, 2003Applicant: Lucent Technologies Inc.Inventors: Vishal Sham Chandnani, David Chu Hom
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Patent number: 6583590Abstract: A string drawing electrical device for a racquet has a casing, a string holder, an actuating device and a control unit. The string holder is rotatably attached to a panel of the casing. The actuating device is mounted in the casing and provides two functions, feeding and reversing, to the string holder. The control unit is mounted in the casing for controlling the actuating device to act. Accordingly, the string drawing electrical device can tighten and loosen the string, and the tensile force of the string of the racquet can be accurately controlled.Type: GrantFiled: January 28, 2002Date of Patent: June 24, 2003Inventor: David Chu
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Publication number: 20020036113Abstract: A speaker cabinet has front and back walls and side walls defining a sound chamber, and a location for supporting at least one speaker in one of the walls. Thin metallic stress elements extend between and are connected to selected pairs of walls, and are loaded undertensile stress so as to tune them to desired resonant frequencies. The tuned stress elements vibrate in response to excitation by sound waves emitted from the speaker, thus producing additional sound which enhances the sound from the speaker. Tensioning means provide for selectively adjusting the tensile stress and resonant frequencies of the stress elements and, consequently, the character of the sound produced by vibration of the stress elements.Type: ApplicationFiled: November 29, 2001Publication date: March 28, 2002Inventor: David Chu
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Patent number: 6302796Abstract: The invention disclosed herein relates to a portable, player programmable, interactive toy for a shooting game played by radiating and appropriately detecting infrared light (or other radiated energy). Player sets of the toy include at least one IR emitter, at least one IR detector, and in the preferred embodiments, at least one audio or visual device. A keypad or other input device is provided for the entry of coded information to select from preprogrammed features and functions, including game modes, both prior to the start of a game and/or during a game. The interactivity includes at least two players interacting other than by detection of a hit, i.e., detection by one player of light shot by another player. The invention provides for information transfer between players to transfer or remotely activate features and functions or to remotely control another player's equipment.Type: GrantFiled: January 29, 1998Date of Patent: October 16, 2001Assignee: Toymax Inc.Inventors: Steven Lebensfeld, David Chu Ki Kwan, Frank Landi, Carmine Russo, John Ping Chan
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Patent number: 6293869Abstract: In a shooting game toy, a target includes a display device that provides different image patterns to facilitate a communication of different states, or changes of state, of a shooting game or the toy. In a preferred embodiment, the display device is an electroluminescent display having a plurality of display elements that are activated in a predefined sequence corresponding to each state or change of state of the shooting game. For example, a routine hit of the target may be visually displayed as an image pattern representative of a conventional “outward burst” pattern, while a reset to a known state may be visually displayed as an inwardly contracting pattern, a destruction of the target as yet another visual pattern, and so on. By providing different display patterns at each target, the state of the game, or a change of state of the Game, is visually communicated to each participant having a view of the target, thereby enhancing the enjoyment of the shooting game.Type: GrantFiled: December 30, 1999Date of Patent: September 25, 2001Assignee: Toymax Inc.Inventors: David Chu Ki Kwan, Sammy To
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Patent number: 6261180Abstract: The invention disclosed herein relates to a portable, programmable, interactive toy for a shooting game played by radiating and appropriately detecting infrared light (or other radiated energy). A player set includes an IR light projector (gun), an IR light detector (target) and a detachable, programmable data (or program) module which controls operation of the toy in accordance with data programmed therein. The data module may be detached, and the toy will operate in a default mode which is downwardly compatible with other toys that do not include the programmable data module. The toy also includes a base unit which programs the data modules to provide each player with a unique firing code. The data modules may also include circuitry which recognizes the different codes. The data modules may accumulate game and player information such as the number of shots fired by the associated gun, the number of hits registered by the associated target, and the source (player identification) of each hit registered.Type: GrantFiled: February 6, 1998Date of Patent: July 17, 2001Assignee: Toymax Inc.Inventors: Steven Lebensfeld, David Chu Ki Kwan, Frank Landi, Sammy To, Deni Rivette
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Patent number: 6071166Abstract: The invention disclosed herein provides toy objects such as action figures, robots, vehicles, creatures, etc., with apparatus for playing a shooting game controlled by one or more human players. Each toy object includes either a energy emitter, a energy sensor, or both. The toy objects are manipulatable by the players to face the emitters and the sensors in directions to hit other objects with radiated energy or avoid being hit with radiated energy from other objects. In the preferred embodiment, the emitter radiates infrared light and the sensor detects infrared light, and are operated from a backpack movably attached to an action figure. Control of radiating and detecting infrared light is similar to the control in a currently popular "laser" shooting games available from Toymax Inc. under the trademark "Laser Challenge".Type: GrantFiled: April 21, 1998Date of Patent: June 6, 2000Assignee: Toymax Inc.Inventors: Steven Lebensfeld, David Chu Ki Kwan, Harvey Goldberg, Carmine Russo
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Patent number: 6011489Abstract: A "try me" feature for remotely controlled devices such as remotely controlled toys for point of sale demonstration or sampling. A secondary link is provided between the remote control device and the remotely controlled device. When the secondary link is selected or present, activation of a control on the remote control device will cause the remotely control device to react the same or similar to the way it reacts under wireless remote control, but via the secondary link. In the preferred embodiment, the secondary link includes a disconnectable wired coupling. The remotely controlled device and the remote control device may be contained in a point of sale package or configured in a point of sale display. In one embodiment, the remotely controlled device has a switch by which the secondary coupling and "try me" operation, or normal wireless remote control operation is selected.Type: GrantFiled: January 12, 1998Date of Patent: January 4, 2000Assignee: Toymax Inc.Inventors: David Chu Ki Kwan, Steven Lebensfeld, Carmine Russo, Russell Javors
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Patent number: 5984788Abstract: The invention provides a toy light projector or light gun and player-worn and self-propelled toy targets which detect light emitted by a toy light gun, and a toy shooting game which includes at least one toy light gun, and at least one toy target. The game is played by a player attempting to "hit" a target which provides a feelable output upon detecting light projected by the gun, e.g., an ejection or release of a material, object, vibration, electrical shock, etc. The output is intended to be received and felt (other than by sight or sound) by a person playing the game. In the preferred embodiments, the target squirts water or bursts a water-filled balloon when a hit is detected or after a given number of hits is detected. Audio/visual effects may also be provided in response to hits.Type: GrantFiled: June 9, 1997Date of Patent: November 16, 1999Assignee: Toymax Inc.Inventors: Steven Lebensfeld, Frank Landi, Carmine Russo, David Chu Ki Kwan