Patents by Inventor Martin K. Shofner

Martin K. Shofner 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).

  • Crutch assembly
    Patent number: 5673719
    Abstract: A crutch assembly having right and left leg members and a horizontal cross-body member. The right and left legs can swivel both forward and backward and from side to side. Swivel joints contained within the aluminum tubing provide for the movement of the legs.
    Type: Grant
    Filed: October 27, 1995
    Date of Patent: October 7, 1997
    Inventor: Martin K. Shofner
  • Crutch assembly
    Patent number: 4245659
    Abstract: A crutch assembly including a cross-member adapted to be strapped to a user, and a pair of spaced crutch members attached to the cross-member in such a way as to be free to pivot through a solid angle with respect to the cross-member.
    Type: Grant
    Filed: March 2, 1979
    Date of Patent: January 20, 1981
    Inventor: Martin K. Shofner