Patents by Inventor Lothar Grohmann

Lothar Grohmann 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).

  • Superheterodyne receiver with a digitally adjustable tuning arrangement
    Patent number: 4009438
    Abstract: The invention provides a superheterodyne receiver having a digitally adjustable tuning arrangement which permits wide adjustable frequency ranges and in which nearly no deviation from the adjusted frequency occurs over the entire adjustable frequency range.
    Type: Grant
    Filed: June 20, 1974
    Date of Patent: February 22, 1977
    Assignee: International Standard Electric Corporation
    Inventor: Lothar Grohmann
  • Radio or television receiver with an automatic station finding arrangement
    Patent number: 3965336
    Abstract: In a radio or television receiver containing an automatic station finder with a digital counter, a clock generator, and a digital-to-analog converter forming the tuning voltage for the varactors, a recall memory consisting of two series-connected parallel memories is connected in parallel with the digital counter. At a stop signal from the automatic station finder the first parallel memory records the instantaneous count of the digital counter; at an automatic-station-finding start signal the second parallel memory, to which the parallel input of the digital counter is connected, records the contents of the first parallel memory.
    Type: Grant
    Filed: November 14, 1974
    Date of Patent: June 22, 1976
    Assignee: International Standard Electric Corporation
    Inventor: Lothar Grohmann