Patents by Inventor Paul P. Symbol

Paul P. Symbol 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).

  • Impact wrench for hexagonal nuts
    Patent number: 4253353
    Abstract: An impact wrench for hexagonal nuts including a unitary metal plate having a central hexagonally shaped aperture and six equally peripherally spaced notches, each having an impact surface coplanar with successive sides of the nut.
    Type: Grant
    Filed: August 31, 1979
    Date of Patent: March 3, 1981
    Inventor: Paul P. Symbol
  • Boat Propeller
    Patent number: 3936228
    Abstract: A boat propeller includes an elongated shaft and three vanes which extend outwardly from the shaft at axially spaced positions there along. The vanes lie approximately along a helix on the shaft, and the vanes are spaced about 120.degree. apart around the circumference of the shaft.
    Type: Grant
    Filed: May 8, 1974
    Date of Patent: February 3, 1976
    Inventor: Paul P. Symbol