Patents by Inventor William F. Knowles

William F. Knowles 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).

  • Lounge chair
    Patent number: 4341420
    Abstract: An articulated frame hanging chair, the frame of which includes an articulated parallelogram in which the exposed scissoring intersections are shielded and the articulation of the frame is adjustably limited to prevent the center of gravity of the hanging chair from shifting so as to dislodge the user in an unsafe manner.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: July 27, 1982
    Inventors: William F. Knowles, Larry F. Knowles, H. LeRoy Oliver