Patents by Inventor James M. O'Keefe

James M. O'Keefe 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).

  • Method of forming cartridge chambers in firearm barrels
    Patent number: 4359810
    Abstract: Method of forming a cartridge chamber in the bore of a firearm barrel, which comprises driving into the bore of the barrel from the butt end thereof a mandrel of the surface configuration of the peripheral wall and mouth of the cartridge chamber, whereby the bore metal is squeezed into close form-fit with the mandrel, and then retracting the mandrel from the barrel bore.
    Type: Grant
    Filed: January 16, 1980
    Date of Patent: November 23, 1982
    Assignee: The Marlin Firearms Company
    Inventors: William E. Osborne, Arthur H. Burns, Jr., James M. O'Keefe