Patents by Inventor Larry H. Merrick

Larry H. Merrick 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).

Method and apparatus for determining the reference voltage in an impressed current corrosion protection system

Patent number: 4160171

Abstract: Method and apparatus for determining the true cathode polarization potential or reference voltage for any corrosion protection system and which determination may be visually indicated, used as a feedback for automatic control of the corrosion protection system or both.

Type: Grant

Filed: August 5, 1977

Date of Patent: July 3, 1979

Assignee: Harco Corporation

Inventor: Larry H. Merrick

Method and apparatus for determining the reference voltage in an impressed current corrosion protection system