Patents by Inventor John D. Piatkowski

John D. Piatkowski 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: D356428
    Type: Grant
    Filed: April 4, 1994
    Date of Patent: March 14, 1995
    Inventors: John D. Piatkowski, Jennifer L. Piatkowski