Patents by Inventor David Cheng

David Cheng 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).

  • Patent number: 8511699
    Abstract: A modular wheelchair assembly is adapted to be reconfigured between a fixed angle of tilt, a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's knees and a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's center of gravity. The reconfiguration is achieved by modifying a limited number of selectively removable components of the support assembly or the pivot assembly of the wheelchair.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: August 20, 2013
    Assignee: PDG Product Design Group Inc.
    Inventors: Nancy Balcom, Louis Belanger, Torr Brown, Janusz Krawczynski, Phil Mundy, David Harding, David Cheng Cheng
  • Patent number: 8424896
    Abstract: A telescoping crossbar assembly for a wheelchair comprises an inner tube that is slidable within an outer tube. The head portion of a pass-through fastener bears on the inner tube through a sufficiently large head-side aperture so as to slightly deform the inner tube and to hold the two tubes by friction in mutual engagement.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: April 23, 2013
    Assignee: PDG Product Design Group Inc.
    Inventors: Nancy Balcom, Louis Belanger, Torr Brown, Janusz Krawczynski, Phil Mundy, David Harding, David Cheng Cheng
  • Patent number: 8336898
    Abstract: A modular wheelchair assembly is adapted to be reconfigured between a fixed angle of tilt, a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's knees and a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's center of gravity. The reconfiguration is achieved by modifying a limited number of selectively removable components of the support assembly or the pivot assembly of the wheelchair.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: December 25, 2012
    Assignee: PDG Product Design Group Inc.
    Inventors: Nancy Balcom, Louis Belanger, Torr Brown, Janusz Krawczynski, Phil Mundy, David Harding, David Cheng Cheng
  • Publication number: 20120119466
    Abstract: A modular wheelchair assembly is adapted to be reconfigured between a fixed angle of tilt, a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's knees and a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's center of gravity. The reconfiguration is achieved by modifying a limited number of selectively removable components of the support assembly or the pivot assembly of the wheelchair.
    Type: Application
    Filed: January 6, 2012
    Publication date: May 17, 2012
    Inventors: Nancy Balcom, Louis Belanger, Torr Brown, Janusz Krawczynski, Phil Mundy, David Harding, David Cheng Cheng
  • Publication number: 20120104724
    Abstract: A modular wheelchair assembly is adapted to be reconfigured between a fixed angle of tilt, a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's knees and a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's center of gravity. The reconfiguration is achieved by modifying a limited number of selectively removable components of the support assembly or the pivot assembly of the wheelchair.
    Type: Application
    Filed: January 6, 2012
    Publication date: May 3, 2012
    Inventors: Nancy Balcom, Louis Belanger, Torr Brown, Janusz Krawczynski, Phil Mundy, David Harding, David Cheng Cheng
  • Publication number: 20120104726
    Abstract: A modular wheelchair assembly is adapted to be reconfigured between a fixed angle of tilt, a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's knees and a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's center of gravity. The reconfiguration is achieved by modifying a limited number of selectively removable components of the support assembly or the pivot assembly of the wheelchair.
    Type: Application
    Filed: January 6, 2012
    Publication date: May 3, 2012
    Inventors: Nancy Balcom, Louis Belanger, Torr Brown, Janusz Krawczynski, Phil Mundy, David Harding, David Cheng Cheng
  • Patent number: 8132823
    Abstract: A modular wheelchair assembly is adapted to be reconfigured between a fixed angle of tilt, a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's knees and a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's center of gravity. The reconfiguration is achieved by modifying a limited number of selectively removable components of the support assembly or the pivot assembly of the wheelchair.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: March 13, 2012
    Assignee: PDG Product Design Group Inc.
    Inventors: Nancy Balcom, Louis Belanger, Torr Brown, Janusz Krawczynski, Phil Mundy, David Harding, David Cheng Cheng
  • Patent number: 8045489
    Abstract: A method for the automatic configuration of conference resources includes receiving a user request identifying at least one conference resource to be used in a conference. The at least one conference resource is reserved for the conference. Operation of the conference resource is automatically initiated without user interaction.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: October 25, 2011
    Assignee: Cisco Technology, Inc.
    Inventors: David Cheng-Wei Lee, Fadi Jabbour, Eric H. Lee
  • Patent number: 7970674
    Abstract: A facility procuring information about a distinguished property from its owner that is usable to refine an automatic valuation of the distinguished property is described. The facility displays information about the distinguished property used in the automatic valuation of the distinguished property. The facility obtains user input from the owner adjusting at least one aspect of information about the distinguished property used in the automatic valuation of the distinguished property. The facility then displays to the owner a refined valuation of the distinguished property that is based on the adjustment of the obtained user input.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: June 28, 2011
    Assignee: Zillow, Inc.
    Inventors: David Cheng, Stan Humphries, Kyusik Chung, Dong Xiang, Jonathan Burstein
  • Patent number: 7970943
    Abstract: A system manages information exchanges between components of the system so that information is provided in a format expected by each particular component. In a specific implementation, a translation service provider intercepts information exchanges between client and data sources or data services and translates of converts software identifiers (e.g., UUIDs or GUIDs) as needed so that the client or data source can properly process the data. For example, a client may use GUIDs in a first format, and when information is requested is presented using a GUID in a second format, different from the first, the translation service provider translates a GUID to the first format. The translation service provider may be transparent to the other components of the system.
    Type: Grant
    Filed: August 14, 2007
    Date of Patent: June 28, 2011
    Assignee: Oracle International Corporation
    Inventors: David Cheng-Fang Lin, Mark Edward Wilcox
  • Publication number: 20110068553
    Abstract: A modular wheelchair assembly is adapted to be reconfigured between a fixed angle of tilt, a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's knees and a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's center of gravity. The reconfiguration is achieved by modifying a limited number of selectively removable components of the support assembly or the pivot assembly of the wheelchair.
    Type: Application
    Filed: November 30, 2010
    Publication date: March 24, 2011
    Inventors: NANCY BALCOM, Louis Belanger, Torr Brown, Janusz Krawczynski, Phil Mundy, David Harding, David Cheng Cheng
  • Patent number: 7871094
    Abstract: A modular wheelchair assembly is adapted to be reconfigured between a fixed angle of tilt, a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's knees and a dynamically adjustable tilt-in-space configuration with the tilt axis being near the user's center of gravity. The reconfiguration is achieved by modifying a limited number of selectively removable components of the support assembly or the pivot assembly of the wheelchair.
    Type: Grant
    Filed: August 14, 2007
    Date of Patent: January 18, 2011
    Assignee: PDG, Inc.
    Inventors: Nancy Balcom, Louis Belanger, Torr Brown, Janusz Krawczynski, Phil Mundy, David Harding, David Cheng Cheng
  • Publication number: 20100221915
    Abstract: A method and apparatus for semiconductor processing is disclosed. In one embodiment, a method of transporting a wafer within a cluster tool, comprises placing the wafer into a first segment of a vacuum enclosure, the vacuum enclosure being attached to a processing chamber and a factory interface. The wafer is transported to a second segment of the vacuum enclosure using a vertical transport mechanism, wherein the second segment is above or below the first segment.
    Type: Application
    Filed: May 7, 2010
    Publication date: September 2, 2010
    Inventors: J.B. Price, Jed Keller, Laurence Dulmage, David Cheng
  • Patent number: 7748944
    Abstract: A method and apparatus for semiconductor processing is disclosed. In one embodiment, a method of transporting a wafer within a cluster tool, comprises placing the wafer into a first segment of a vacuum enclosure, the vacuum enclosure being attached to a processing chamber and a factory interface. The wafer is transported to a second segment of the vacuum enclosure using a vertical transport mechanism, wherein the second segment is above or below the first segment.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: July 6, 2010
    Assignee: Crossing Automation, Inc.
    Inventors: JB Price, Jed Keller, Laurence Dulmage, David Cheng
  • Patent number: 7752233
    Abstract: Described are techniques for clustering a data set of objects. Divide phase processing is performed to partition the data set into two or more partitions forming a hierarchy of the objects. Merge phase processing may be performing using the hierarchy to determine one or more disjoint clusters of objects of the data set. Optional preprocessing may be performed to determine weights for one or more features of an object.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: July 6, 2010
    Assignees: Massachusetts Institute of Technology, Yale University
    Inventors: Santosh Vempala, Grant Wang, Ravi Kannan, David Cheng
  • Patent number: 7729489
    Abstract: Methods and systems for transferring a communications exchange using a mobile handset are described. A radio frequency (RF) signal is transmitted from a mobile handset to a base station to provide a communications exchange. The communications exchange exists between the mobile handset and a first communications device. The mobile handset automatically detects a second communications device when it is in close proximity to the second communications device. The second communications device is capable of receiving a call handoff. If the mobile handset is in close proximity to the second communications device, then a transfer request including information associated with the second communications device is received from the second communications device. The transfer request is accepted and the communications exchange is seamlessly transferred to the second communications device form the mobile handset.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: David Cheng-Wei Lee, Johnny Hsienchow Lee, Fadi Ramzi Jabbour, Eric HengChih Lee
  • Patent number: 7646763
    Abstract: High compression rate codecs in gateways servicing Voice-over-Internet Protocol (VoIP) and Voice Band Data (VBD) calls distort modem/fax Answer Back Tones (e.g., 2100 Hz), which may lead to signal distortion and call hang-ups. To prevent such occurrences, a method or corresponding apparatus forces originating and terminating gateways to stay in a low complexity non-voice compression codec (e.g., ITU G.711) after prenegotiating a high complexity, voice compression codec (e.g., G.729 or G.726) during a short beginning period of a voice call. The low complexity codec avoids distorted answer back tone leakage associated with previous solutions that use a notch filter to block the leakage, thereby significantly improving the success rate of a VBD call by completely eliminating modem answer back tone distortion caused by high complexity codecs that use voice compression and by completely eliminating use of the notch filter.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: January 12, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: David Cheng-Song Qi, Yan Wang, Timothy G. Wade
  • Patent number: 7609646
    Abstract: A system in a Voice Over Internet Protocol (VOIP) network eliminates false voice detection in voice band data service (e.g., modem or facsimile transmission) by sequentially enabling silence detection then voice detection. In Voice Band Data (VBD) mode, the system initially enables silence detection and disables voice detection. If silence is detected in a VOIP signal associated with a VOIP call, the system enables voice detection. If voice is detected, the system switches from VBD mode to voice mode and enables processing (e.g., echo cancellation and/or data compression) that improves voice communications.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: October 27, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: David Cheng-Song Qi, Yan Wang, Timothy G. Wade
  • Patent number: D599707
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: September 8, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: David Cheng, Jason Matthew Wilbur
  • Patent number: D636014
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: April 12, 2011
    Inventor: David Cheng