Patents by Inventor Malcolm Chellquist

Malcolm Chellquist 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).

  • Automatic dynamic equalizing
    Patent number: 4739514
    Abstract: An automatic dynamic equalizer includes left and right input terminals, an input adder and left and right output adders. The left and right input terminals are connected to inputs of the input adder and inputs of the left and right output adder, respectively. The output of the input adder is connected to the input of a 2:1 compressor. The output of the 2:1 compressor is connected to the input of a bandpass filter having a transmission in the low bass frequency region centered at a frequency of about 60 Hz. The output of the bandpass filter is coupled to inputs of the left and right output adders.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: April 19, 1988
    Assignee: Bose Corporation
    Inventors: William R. Short, Malcolm Chellquist