Patents by Inventor Richard Y. Murata

Richard Y. Murata 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: 6247081
    Abstract: A method and apparatus for installing device drivers without requiring system re-boot includes installing a driver corresponding to a device into an operating system of a hardware system, wherein the operating system includes a multi-layered driver architecture, including identifying to the operating system at least one other driver to which the driver is to be bound. The driver is then started without re-booting the hardware system.
    Type: Grant
    Filed: February 19, 1998
    Date of Patent: June 12, 2001
    Assignee: Nortel Networks Limited
    Inventor: Richard Y. Murata
  • Patent number: 6170013
    Abstract: An apparatus communicatively coupling at least one client to a data network is depicted, the apparatus comprising a storage device, operative to store and retrieve information on demand, and a controller coupled to the storage device. The controller is operative to receive information from the data network on behalf of and in response to a client request, and to provide the requesting client with the received information. In addition, in accordance with the teachings of the present invention, the controller is operative to modify an expiration time of the received information and store the received information in the storage device wherein subsequent requests for the information are satisfied by the information available within the storage device, rather than the data network, until the modified expiration time has expired.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: January 2, 2001
    Assignee: Nortel Networks Limited
    Inventor: Richard Y. Murata
  • Patent number: 5130786
    Abstract: A method of color image compression processing provides compensation for lossy luminance compression (30) by adjusting (34) the red and blue color components using a lossy luminance compression factor equal to the difference between compressed and decompressed luminance. The compensated color components are then used to compute (42) chrominance color differences. Chrominance is range compressed (44) by bit-reduction using a non-linear range compression function that minimizes compression for small chrominance magnitudes, where the eye is more sensitive to a loss of color fidelity, while maximizing compression in the color saturation regions where the eye is less sensitive.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: July 14, 1992
    Assignee: Image Data Corporation
    Inventors: Richard Y. Murata, Harry S. Pyle