Patents by Inventor Hans W. Pfeiffer

Hans W. Pfeiffer 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).

  • Apparatus for supporting sporting guns during testing intervals
    Patent number: 4159588
    Abstract: An apparatus for supporting sporting guns during test-firing intervals and for cooling the gun barrel. The apparatus has a frame provided with supports for the sporting gun. The frame comprises a conduit extending at an inclined position relative to the ground for receiving at least the barrel of the supported sporting gun and being adapted to have a gaseous cooling medium conducted therethrough.
    Type: Grant
    Filed: July 27, 1977
    Date of Patent: July 3, 1979
    Inventor: Hans W. Pfeiffer