Patents by Inventor Matthew C. Reprogle

Matthew C. Reprogle 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).

  • Held music history circuit
    Patent number: 4947431
    Abstract: A circuit is provided which gauges the amount of significant high-frequency spectral energy in the very recent history of the program material and ignores the effects of short noise bursts and other transients associated with FM reception in the moving vehicle. The circuit provides an output voltage which can be used to adjust the attack characteristics of an audio processor.
    Type: Grant
    Filed: September 13, 1989
    Date of Patent: August 7, 1990
    Assignee: Delco Electronics Corporation
    Inventors: Richard S. Stroud, Fred J. Anderson, Matthew C. Reprogle, Douglas E. White, Jeffrey J. Marrah, Gregory J. Manlove