Patents by Inventor Marian J. Trefethern

Marian J. Trefethern 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).

  • Patent number: 4700648
    Abstract: A recreational and therapeutic propelled pontoon chair. The invention fundamentally comprises a pair of pontoons in fixed spaced relationship with each other. A chair for maintaining a user is positioned between the pontoons with a drive and power source being maintained behind the chair. The chair is adjustable in elevation and includes an adjustable leg rest. Control cables on an arm rest regulate speed and direction. In another embodiment, such cables are attached to a headband.
    Type: Grant
    Filed: July 8, 1986
    Date of Patent: October 20, 1987
    Inventors: George M. Trefethern, Marian J. Trefethern