Patents by Inventor Earl J. Slafon

Earl J. Slafon 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).

  • Two channel audio surround sound circuit with automatic level control
    Patent number: 8121318
    Abstract: The two channel audio surround sound circuit with automatic level control includes a right amplifier, a left amplifier, a right automatic level control and a left automatic level control. A right input is coupled to a positive input of the left amplifier through the right automatic gain control. The right input is coupled to a negative input of the right amplifier and coupled to the output of the right amplifier with one resistor. A left input is coupled to a positive input of the right amplifier through the left automatic gain control. The left input is coupled to a negative input of the left amplifier and coupled to the output of the left amplifier with another resistor.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: February 21, 2012
    Inventors: Paul R. Ambourn, Earl J. Slafon