Patents by Inventor Christopher T. Cheng

Christopher T. 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).

  • Publication number: 20100121348
    Abstract: An insertion tool is used to implant a knotless suture anchor to secure soft tissue to a rigid structure such as bone. The anchor has an inner member that receives suture thread and rotates within an outer tubular member. An inner shaft on the insertion tool engages the inner tubular member and is used to rotate the inner tubular member so that the suture thread is wrapped onto the inner tubular member thereby increasing contact with the outer tubular member of the anchor which applies pressure to the wrapped suture thread to retain it in position on the inner tubular member while simultaneously and adjustably tensioning the suture thread. The insertion tool has an outer shaft that engages the outer tubular member of the anchor and prevents the outer tubular member from rotating as the inner shaft on the insertion tool rotates the inner tubular member on the anchor.
    Type: Application
    Filed: November 12, 2008
    Publication date: May 13, 2010
    Applicant: ROSS CREEK MEDICAL
    Inventors: Erik van der Burg, Nathaniel Cohen, Christopher Feezor, Christopher T. Cheng
  • Publication number: 20100063542
    Abstract: A knotless suture anchor provides a method for securing soft tissue to a rigid structure such as bone. The anchor has an inner member that receives suture thread and rotates within an outer tubular member. As the inner member rotates, the suture thread is wrapped onto the inner member thereby increasing contact with the outer tubular member which applies pressure to the wrapped suture thread to retain it in position on the inner member while simultaneously and adjustably tensioning the suture thread. A ratchet prevents undesirable counter-rotation, although the ratchet can be released to permit loosening of the suture thread. Also described is a suture bridge and suture platform for providing further stabilization of a tendon. A method for repairing rotator cuff tears is also described.
    Type: Application
    Filed: September 8, 2008
    Publication date: March 11, 2010
    Inventors: Erik van der Burg, Nathaniel Cohen, Christopher Feezor, Christopher T. Cheng
  • Patent number: 7508398
    Abstract: A system and method for providing antialiased memory access includes receiving a request to access a memory address. The memory address is examined to determine if the memory address is within a virtual frame buffer. If the memory address is within a virtual frame buffer then the memory address is transformed into one or more physical addresses within a frame buffer that is utilized for antialiasing. The frame buffer may be a single memory space containing subpixel information corresponding to pixels of the virtual frame buffer. Subpixels located at the physical addresses within the frame buffer are then accessed. The disclosed invention provides for direct access by a software application.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: March 24, 2009
    Assignee: NVIDIA Corporation
    Inventors: John S. Montrym, Brian D. Hutsell, Steven E. Molnar, Gary M. Tarolli, Christopher T. Cheng, Emmett M. Kilgariff, Abraham B. de Waal
  • Patent number: 7457937
    Abstract: Embodiments of the present invention recite a method and system for accessing data. In one embodiment of the present invention, a plurality of instances of data are stored in a memory device which comprises a plurality of memory modules disposed as an array of parallel columns. In response to receiving an indication that said plurality of instances of data is being accessed as a row of data, a first address translation table is accessed which describes the same row address in each of said plurality of memory modules wherein an instance of data is stored. Then, in response to receiving an indication that said plurality of instances of data is being accessed as a column of data, a second address translation table is accessed which describes a successive row address in each successive memory module wherein an instance of data is stored.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: November 25, 2008
    Assignee: Nvidia Corporation
    Inventors: Christopher T. Cheng, Stephen C. Purcell
  • Patent number: 6834623
    Abstract: An embodiment of the present invention is a portable hydrogen generation system for operating a vehicle powered by either the hydrogen internal combustion engine or a fuel cell using active metals such as sodium potassium, magnesium, aluminum or iron in the form of an emulsion, and a method thereof. The emulsion comprises a metal powder pre-mixed with oil. In the case of sodium, potassium and magnesium, the metal is reacting with water at or near room temperature. However, in the case of aluminum and iron, the metal is reacting with alkali hydroxide solutions. The system is controlled and managed by a microprocessor in order to generate hydrogen on demand at or near room temperature with a very high efficiency.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: December 28, 2004
    Inventor: Christopher T. Cheng
  • Publication number: 20040025808
    Abstract: An embodiment of the present invention is a portable hydrogen generation system for operating a vehicle powered by either the hydrogen internal combustion engine or a fuel cell using active metals such as sodium potassium, magnesium, aluminum or iron in the form of an emulsion, and a method thereof. The emulsion comprises a metal powder pre-mixed with oil. In the case of sodium, potassium and magnesium, the metal is reacting with water at or near room temperature. However, in the case of aluminum and iron, the metal is reacting with alkali hydroxide solutions. The system is controlled and managed by a microprocessor in order to generate hydrogen on demand at or near room temperature with a very high efficiency.
    Type: Application
    Filed: August 6, 2003
    Publication date: February 12, 2004
    Inventor: Christopher T. Cheng
  • Publication number: 20030033991
    Abstract: A portable hydrogen generation system for operating a vehicle powered by either the hydrogen internal combustion engine or a fuel cell using active metals such as sodium potassium, magnesium, aluminum or iron in the form of an emulsion. In the case of sodium, potassium and magnesium, the metal is reacting with water. However, in the case of aluminum and iron, the metal is reacting with alkali hydroxide solutions. The system is orchestrated by a microprocessor in order to generate hydrogen on demand with a very high efficiency.
    Type: Application
    Filed: August 7, 2001
    Publication date: February 20, 2003
    Inventor: Christopher T. Cheng
  • Patent number: 5251164
    Abstract: A high-speed, area efficient, low-power absolute value arithmetic unit that efficiently produces the absolute value of the difference of two input operands. This arithmetic unit is adaptable to provide other output functions. Further, the arithmetic unit of the present invention may be utilized as a data path element in a high performance floating point arithmetic unit. The present invention includes a propagate and generate block, a carry-chain-and a difference multiplexer. Operands A and B are received by the absolute value arithmetic unit. The propagate and generate block converts operands A and B into propagate signals and generate signals. The carry-chain-receives propagate and generate signals and produces carry-chain-propagate signals and carry-chain-generate signals for every bit, where the most significant carry-chain-generate signal is used to indicate a borrow.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: October 5, 1993
    Assignee: S-MOS Systems, Inc.
    Inventors: Jeffrey M. Dodson, Christopher T. Cheng