Patents by Inventor Mary L. Keegstra

Mary L. Keegstra 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).

  • Voice bus for a computer backplane
    Patent number: 5495583
    Abstract: A voice bus on a computer backplane provides point-to-point connection between a plurality of slots on the backplane to a particular slot. Connection from the plurality of slots is provided by third connectors which lie between first and second connectors defining the slots. Connection to the particular slot is via its respective second connector. In particular, the computer backplane is physically and electrically compatible with the IEEE standard 1014-1987 defining the VMEbus. The presence of the third connector is compatible with the VMEbus standard both electrically and physically.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: February 27, 1996
    Assignee: Northern Telecom Limited
    Inventors: Bruce L. Townsend, Mary L. Keegstra, Balwantrai Mistry, Paul N. Ramsden, Raymond B. Wallace