Patents by Inventor David M. Tweed

David M. Tweed 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).

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    Patent number: D309630
    Type: Grant
    Filed: February 25, 1988
    Date of Patent: July 31, 1990
    Assignee: U.S. West Inc.
    Inventors: Richard Foy, Thomas Ruzicka, David A. Shelton, David M. Tweed