Patents by Inventor Robert R. Walper

Robert R. Walper 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: D269543
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: June 28, 1983
    Assignee: Walper Corporation
    Inventors: Robert R. Walper, Frederick R. Wilkes