Patents by Inventor Hugh D. Sontag

Hugh D. Sontag 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).

  • Signal transmission system
    Patent number: 4654880
    Abstract: A signal transmission system for transmitting a signal across a barrier. A radio frequency receiver as coupled to a receiving resonant antenna. A transmitting resonant antenna coupled to a radio frequency transmitter on the other side of the barrier. The resonant frequency of the receiving resonant antenna is relatively close to the resonant frequency of the transmitting resonant antenna. The radio frequency transmitter has an oscillator having a frequency of oscillation driving a resonant load which includes the transmitting resonant antenna and its inductive coupling with the receiving resonant antenna. The frequency of oscillation of the oscillator of the radio frequency transmitter being at least partially determined by the resonant frequency of the resonant load which it drives.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: March 31, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Hugh D. Sontag