Patents by Inventor James E. Roberson, Sr.

James E. Roberson, Sr. 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).

  • Underwater propulsion unit
    Patent number: 4220110
    Abstract: A self-contained unit for underwater propulsion, for use with scuba tanks. The unit comprises an hydraulic motor which uses a special air compressor oil as an hydraulic fluid and uses the breathing medium to circulate the oil uniformly mixed therewith the mixture being powered by the breathing air supply itself and later separated, the air being then filtered for use as breathing medium by the diver.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: September 2, 1980
    Inventors: James E. Roberson, Sr., James E. Roberson, Jr.