Patents by Inventor Friedhelm Sender

Friedhelm Sender 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).

  • Borehole antenna array for determining radar incidence direction
    Patent number: 4670717
    Abstract: An antenna arrangement for use in a bore hole to receive radar signals and produce electrical signals from which the incidence direction of the radar signals can be determined includes a cross coil arrangement with two coils having elongated sides mounted adjacent the outer surface of a cylindrical insulative probe body. In one embodiment, one cross coil assembly is used in conjunction with an omnidirectional antenna and an evaluation circuit. In another embodiment two axially aligned cross coil assemblies are connected to also be usable as an omnidirectional antenna.
    Type: Grant
    Filed: March 7, 1984
    Date of Patent: June 2, 1987
    Inventor: Friedhelm Sender