Patents by Inventor David D. Headrick

David D. Headrick 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: D311677
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: October 30, 1990
    Inventor: David D. Headrick