Patents by Inventor Leonard Di Grasso

Leonard Di Grasso 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).

  • Adjustable die for coldwelding machine
    Patent number: 3946928
    Abstract: An adjustable die set for a coldwelding machine that is adjustable to facilitate its use with workpieces of varying dimensions. Specifically the die set includes pairs of dies having a screw threaded adjustable stop interconnecting them for adjusting the spacing between the dies.
    Type: Grant
    Filed: January 2, 1973
    Date of Patent: March 30, 1976
    Assignee: Kelsey-Hayes Company
    Inventor: Leonard Di Grasso