Patents by Inventor Rodney G. Fredericks

Rodney G. Fredericks 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).

  • Water level gauge
    Patent number: 3933042
    Abstract: The invention disclosed in the specification is directed towards an impro device for measuring liquid levels and specifically provides a pair of capacitance probes, one of which is coated with a dielectric material, positioned in a stilling well which is coupled to a conical housing for an entrance orifice to provide controlled level changes; and, in addition is provided with electronic circuitry and recording equipment and power pack.
    Type: Grant
    Filed: April 5, 1974
    Date of Patent: January 20, 1976
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Norwood H. Rector, Rodney G. Fredericks