Patents by Inventor Malcolm T. Duffee

Malcolm T. Duffee 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).

  • Manual pin driver
    Patent number: 4856697
    Abstract: In a manual spring pin inserter, a pair of jaws cooperate with a jaw preloading means to provide increased jaw clamping forces on a pin proportional to advancement of that pin into a hole of a workpiece.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: August 15, 1989
    Assignee: Spirol International Corporation
    Inventor: Malcolm T. Duffee