Patents by Inventor John Joseph Risko

John Joseph Risko 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).

  • Amplitude modulated impatt diode oscillator and a low cost communication system using same
    Patent number: 4118598
    Abstract: A low cost microwave communication system is described in which a transmitter including an IMPATT diode operating CW (Continuous Wave) is amplitude modulated by a video signal such that the radiated RF (radio frequency) output from the transmitter is directly proportional to the amplitude of the video signal. Low level radiated power from the transmitter is picked up by a receiver which includes a "square law" detector. The detector provides an output voltage according to the power level of the received RF signal.
    Type: Grant
    Filed: September 25, 1975
    Date of Patent: October 3, 1978
    Assignee: RCA Corporation
    Inventors: John Joseph Risko, Louis Sebastian Napoli
  • Sheet metal waveguide horn antenna
    Patent number: 4058813
    Abstract: A waveguide horn antenna for transmitting or receiving microwave energy. The antenna comprises a tapered horn portion attached to a straight waveguide portion adapted to be coupled to a source or detector of microwave energy. The walls of the antenna are made of folded sheet metal stamped according to predetermined patterns for simple assembly.
    Type: Grant
    Filed: March 18, 1976
    Date of Patent: November 15, 1977
    Assignee: RCA Corporation
    Inventor: John Joseph Risko