Patents by Inventor William Robert Mayhew

William Robert Mayhew 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).

  • Method of verifying integrity of control module arithmetic logic unit (ALU)
    Patent number: 7600161
    Abstract: A method of verifying the integrity of an arithmetic logic unit (ALU) of a control module includes inputting a first test value into one of a plurality of registers of the ALU and inputting a second test value into remaining registers of the plurality of registers. A first set of operations is performed between the one of the plurality of registers and each of the remaining registers to produce a first set of results. A fault is indicated when one of the first set of results varies from a first predetermined result.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: October 6, 2009
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Mark H. Costin, Timothy J. Hartrey, Tyrus J. Valascho, Steven P. Sullivan, William Robert Mayhew, Ananth Krishnan, Jinchun Peng
  • Method and apparatus for determining and controlling torque induced rotation
    Patent number: 5788040
    Abstract: A torque transmitting rotating body in the vehicle has a desired rotational direction during vehicle travel in response to an operator demand. Rotation of the body is determined by a speed sensor which provides a signal to a control system. The control system determines the direction of rotation from consecutive speed signals and a known input torque. The control then issues the appropriate commands to ensure the direction of rotation of the body is in accordance with the operator demand.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: August 4, 1998
    Assignee: General Motors Corporation
    Inventors: Steven Patrick Moorman, William Robert Mayhew