Patents by Inventor James D. Shepherd

James D. Shepherd 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).

  • Static conductivity tester
    Patent number: 4742295
    Abstract: An elastomeric belt and hose conductivity testing device incorporating a comparator network to verify that a belt or hose is either conductive or nonconductive (resistive) of the flow of static electricity. The device indicates whether the article being tested has a resistivity or conductivity which meets the industry standard of resistivity or conductivity for that particular article. The testing device is battery powered so that it is easily portable for use in the field.
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: May 3, 1988
    Assignee: The Gates Rubber Company
    Inventors: Vance Nahman, Roger Fahlberg, James D. Shepherd