Patents by Inventor Donald Schuler

Donald Schuler 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).

  • Digital system simulation method and apparatus having two signal-level modes of operation
    Patent number: 4628471
    Abstract: A digital system simulation apparatus and method enable better efficiency and precision of system simulation by operating in either a four signal-level mode or a nine signal-level mode, depending upon the particular circuitry being employed. All signal outputs are generated in the nine signal-level mode, however, when the output is directed to a gate level circuit element, the apparatus and method automatically mask the strength data in the output signal thereby providing the four signal-level mode of operation.
    Type: Grant
    Filed: February 2, 1984
    Date of Patent: December 9, 1986
    Assignee: Prime Computer, Inc.
    Inventors: Donald Schuler, Mahesh Doshi