Patents by Inventor Charles R. Ferry

Charles R. Ferry 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).

  • Cathodic protection method and apparatus
    Patent number: 4080272
    Abstract: Method and apparatus for determining the true cathode polarization potential for automatically regulating the impressed current in a cathodic protection system.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: March 21, 1978
    Assignee: Harco Corporation
    Inventors: Charles R. Ferry, Mitchell F. Peterson