Patents by Inventor William A. Burch

William A. Burch 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 method and apparatus
    Patent number: 4825786
    Abstract: A method and apparatus for forming stitches with a sewing machine by periodically rewinding needle thread onto its spool as a sewing needle pulls off bobbin thread so as to form tight lock stitches without a take up lever.
    Type: Grant
    Filed: June 12, 1987
    Date of Patent: May 2, 1989
    Inventor: William A. Burch