Patents by Inventor Keith R. McCullough

Keith R. McCullough 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).

  • Scuba divers propulsion unit
    Patent number: 3995578
    Abstract: A battery operated propulsion unit secured to a SCUBA divers air tank consisting of three chambers; the center one containing the propeller drive motor. On each side of the motor is one battery chamber which contains the batteries that supply the power for the propeller drive motor. The propeller is surrounded by a propeller housing. Wired in series with the motor and power supply batteries is the motor control. Wired in parallel or in series depending on the position of the switch and in series with the motor control and motor is a speed control switch.
    Type: Grant
    Filed: October 3, 1975
    Date of Patent: December 7, 1976
    Inventor: Keith R. McCullough