Patents by Inventor Louis S. Yf

Louis S. Yf 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).

  • System for determining the angular spin position of an object spinning about an axis
    Patent number: 4750689
    Abstract: The invention relates to a system for determining the angular spin position of an object (1) spinning about an axis. The system thereto comprises means (7) for transmitting at least two superimposed phase-locked and polarized carrier waves to obtain the angular spin position. The system further comprises at least two loop antennas (10), connected to the object (1), and receiving means (13) for processing in combination the antennas-received signals.
    Type: Grant
    Filed: March 17, 1987
    Date of Patent: June 14, 1988
    Assignee: Hollandse Signaalapparaten B.V.
    Inventor: Louis S. Yf