Patents by Inventor Charles W. Haldeman, III

Charles W. Haldeman, III 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).

  • High-power, low-loss high-frequency electrical coil
    Patent number: 3946349
    Abstract: High frequency electrical coils are commonly made out of Litz wire. If the coil is baked and an aqueous phenol solution is pumped through a nylon tube making up the structural core of the Litz wire, the tube will be dissolved out, thereby yielding an unobstructed opening through which a cooling fluid may be pumped. The resultant coil has a vastly improved heat conduction and can tolerate substantially higher currents.
    Type: Grant
    Filed: August 3, 1973
    Date of Patent: March 23, 1976
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Charles W. Haldeman, III