Patents by Inventor David H. Mackiewich

David H. Mackiewich 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).

  • Spectacle holder
    Patent number: D306739
    Type: Grant
    Filed: April 23, 1987
    Date of Patent: March 20, 1990
    Inventor: David H. Mackiewich