Patents by Inventor J. P. Fricke

J. P. Fricke 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 reproducing sound information
    Patent number: 4061874
    Abstract: In an environment of acoustic noise, such as a car radio playing in traffic or engine noise, both the volume (AGC) and dynamic range (Compression) of the audio amplifier are controlled by a local ambient acoustic noise sensor, such that gain is increased and dynamic range decreased simultaneously with increased ambient noise.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: December 6, 1977
    Inventors: J. P. Fricke, Ulrich R. Muller