Patents by Inventor John J. Curl

John J. Curl 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).

  • Low noise amplifier
    Patent number: 4035737
    Abstract: A low noise amplifier for amplifying a signal from a moving coil phono cartridge which comprises a plurality of pairs of complimentary first and second transistors in push-pull and each pair in parallel, with a resistance of relatively low-value in the emitter circuit of each transistor and all collectors connected to an output terminal.
    Type: Grant
    Filed: March 5, 1976
    Date of Patent: July 12, 1977
    Inventor: John J. Curl