Patents by Inventor William M. Block

William M. Block 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).

  • Composite feed dog for a sewing machine
    Patent number: 4730567
    Abstract: A composite feed dog for a sewing machine comprises a zinc die cast body portion having a toothed surface region covered by a layer of elastomeric material.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: March 15, 1988
    Assignee: SSMC Inc.
    Inventors: William M. Block, William J. Edwards, Charles R. Odermann, Thaddeus J. Zylbert