Patents by Inventor Hugh E. Williamson

Hugh E. Williamson 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).

  • Toggle press
    Patent number: 4448119
    Abstract: A toggle press comprises a main frame and a tool holder mounted for reciprocal movement relative to the frame by power means actuating an intermediate toggle arrangement comprising two toggle mechanisms acting in series.
    Type: Grant
    Filed: June 9, 1982
    Date of Patent: May 15, 1984
    Assignee: Hugan Limited
    Inventor: Hugh E. Williamson