Patents by Inventor Harold R. Piszczek

Harold R. Piszczek 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).

  • Sewing machine thread guide with protective guard
    Patent number: 4427165
    Abstract: A plastic guide for thread extending from a supply spool to the sewing instrumentalities of a sewing machine is provided with a metal wear bar to engage thread exiting from an opening in the guide and prevent the thread from cutting a groove in the plastic material of the guide at the edge of the opening.
    Type: Grant
    Filed: May 4, 1983
    Date of Patent: January 24, 1984
    Assignee: The Singer Company
    Inventors: Robert H. Larsen, Harold R. Piszczek