Patents by Inventor Willard H. Lind

Willard H. Lind 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).

  • Lever adapter for door knob
    Patent number: 4397489
    Abstract: An adapter for providing a lever attachment to a round door knob has a hollow threaded cylinder fitted with a lever which cylinder slides over the knob and is frictionally secured to the knob by compressing the knob between one end of the cylinder and a tightened split ring threaded into the other end of the cylinder. Elastomeric material placed on either or both sides of the knob increase the friction and prevent slipping of the adapter on the knob after tightening.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: August 9, 1983
    Inventor: Willard H. Lind