Patents by Inventor Gary Marson

Gary Marson 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).

  • Power supply for cathodic protection system
    Patent number: 5077486
    Abstract: A power module for a cathodic protection system is provided having a switch-mode power circuit and a synchronous switch assembly. The method of the invention comprises rectifying an alternating utility power signal with a power transformer and switch assembly. The switch assembly is controlled by a phase control circuit to provide a selective controlled phase delay to provide a 0-100% range power signal to the load selectively operable in a constant current, constant voltage or off-potential manner.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: December 31, 1991
    Inventors: Gary Marson, Art W. Gaber