Patents by Inventor Louis W. Shaffer

Louis W. Shaffer 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).

  • Adaptor for an electrometer probe to permit contact potential measurements and method for using same
    Patent number: 4139813
    Abstract: A conductive housing includes a needle for contacting the object whose potential is desired to be sensed. The housing supports an electrometer probe within its confines. In such manner the probe measures the charge on the housing and provides a reading indicative of the potential on the test object without loading it down.
    Type: Grant
    Filed: April 1, 1977
    Date of Patent: February 13, 1979
    Assignee: Xerox Corporation
    Inventor: Louis W. Shaffer