Patents by Inventor Philip L. Engelhardt

Philip L. Engelhardt 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: D263765
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: April 13, 1982
    Assignee: S. Engelhardt & Co.
    Inventor: Philip L. Engelhardt
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    Patent number: D274017
    Type: Grant
    Filed: November 9, 1981
    Date of Patent: May 29, 1984
    Inventor: Philip L. Engelhardt