Patents by Inventor David B. Stewart

David B. Stewart 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).

  • Carding apparatus
    Patent number: 4162559
    Abstract: A carding flat for use with textile carding machinery comprises an array of individual pins each secured in a respective aperture in a flat support.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: July 31, 1979
    Assignee: Wm. R. Stewart & Sons (Hacklemakers) Limited
    Inventor: David B. Stewart