Patents by Inventor Sigmar W. Willnauer

Sigmar W. Willnauer 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).

  • Integrated circuit memory module
    Patent number: D304448
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: November 7, 1989
    Assignee: Apple Computer Inc.
    Inventors: Michael De La Cruz, Sigmar W. Willnauer
  • Portable diagnostic test apparatus
    Patent number: D339537
    Type: Grant
    Filed: April 9, 1991
    Date of Patent: September 21, 1993
    Assignee: Apple Computer, Inc.
    Inventors: Sigmar W. Willnauer, Anthony Y. Guido, Stephen R. Martin