Patents by Inventor John Hohman

John Hohman 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).

  • Patent number: 5815582
    Abstract: An active plus selective headset system for provision of active attenuation of broadband noise as well as speech filtering comprising a headset with reference microphones, residual microphones and speakers on each of a pair of open backed muffs and a controller means.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: September 29, 1998
    Assignee: Noise Cancellation Technologies, Inc.
    Inventors: David Claybaugh, Jeffrey N. Denenberg, Ralph Busch, John Hohman