Patents by Inventor William H. Koelbel

William H. Koelbel 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: D247406
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: March 7, 1978
    Inventors: Otto Stahl, William H. Koelbel