Patents by Inventor Clarence William Challenger

Clarence William Challenger 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).

  • Device for automatic raising of fish traps, crayfish pots, nets and the like
    Patent number: 4034693
    Abstract: A device for automatically raising fish traps, crayfish pots, nets and the like comprising a cylinder of compressed gas connected through a control valve to a buoyancy chamber provided with a discharge opening and adapted to be filled with water when the trap is submerged, the operation of the control valve is to allow gas to pass from the cylinder to the buoyancy chamber and expel water from the buoyancy chamber being effected through a timing mechanism or an electrical circuit activated by a signal transmitted through the water.
    Type: Grant
    Filed: June 20, 1975
    Date of Patent: July 12, 1977
    Inventor: Clarence William Challenger