Patents by Inventor Marcus A. Hall

Marcus A. Hall 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).

  • Continuously advancing mandrel
    Patent number: 4213811
    Abstract: A continuously advancing definite length mandrel device wherein a cylindrical mandrel surface is formed by helically wound closed-loop belt convolutions, improved in that a plurality of belts are employed to form the surface.
    Type: Grant
    Filed: May 10, 1978
    Date of Patent: July 22, 1980
    Assignee: Automation Industries, Inc.
    Inventors: Marcus A. Hall, Thomas A. Kutnyak