Patents by Inventor Daniel Willaim John Johnson

Daniel Willaim John Johnson 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 and system for detecting the presence of adapter cards
    Patent number: 5786769
    Abstract: A method and apparatus for detecting the presence/absence of adapter cards such as memory modules and alike. The method and apparatus utilize adapter cards which have wrap around pins for coupling grounds thereto. This coupled ground is then used by a Ground Detection Circuit and combined with different signals emanating from the memory modules such that when one or more of the adapter cards are absent, a default value resulting from the absence of ground is used to indicate the missing adapter(s).
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: July 28, 1998
    Assignee: International Business Machines Corporation
    Inventors: Paul William Coteus, Daniel Willaim John Johnson