Patents by Inventor Harry Teder

Harry Teder 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).

  • Variable recovery time circuit for use with wide dynamic range automatic gain control for hearing aid
    Patent number: 5144675
    Abstract: A gain control voltage is applied to a control terminal of a variable gain hearing aid amplifier which is logarithmically related to a signal voltage level which is sensed at either an input terminal or an output terminal of the amplifier and which is below a certain threshold value, and an impedance is connected to the control terminal which includes, in parallel a first capacitor, a series combination of a resistor and a second capacitor of larger value than the first, the impedance being operative at signal levels below the threshold value to provide a rapid recovery from short intense sounds and a much slower recovery from prolonged intense sounds.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: September 1, 1992
    Assignee: Etymotic Research, Inc.
    Inventors: Mead C. Killion, Harry Teder, Arthur C. Johnson, Steven P. Hanke