Patents by Inventor Elmer L. Allen, Jr.

Elmer L. Allen, Jr. 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).

  • Resistivity measurement system
    Patent number: 4220915
    Abstract: A system for measuring the bulk resistivity or sheet resistance of a sample of material includes a source of r.f. signals, a transmitting device and receiving device. The sample is placed between the transmitter and the receiver. A display is used to monitor the amplitude characteristic of the received r.f. signal at a particular frequency. The amplitude characteristic at the particular frequency is a measure of the bulk resistivity of the sample of the material.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: September 2, 1980
    Assignee: RCA Corporation
    Inventors: Hirohisa Kawamoto, Elmer L. Allen, Jr.