Patents by Inventor Lawrence R. Fast

Lawrence R. Fast 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).

  • Infrared audio transmitter system
    Patent number: 5596648
    Abstract: An infrared assistive listening system capable of enhanced performance in medium-sized locations, such as courtrooms, classrooms, and conference rooms, is realized by a system comprising a pressure zone microphone capable of picking up distant speakers, a high-gain pre-amplifier, an equalization and pre-emphasis circuit, an automatic gain control and limiting circuit, a mute feature capable of remote activation, a FM modulator, a pulse width modulator, and a high-power single front throw infrared emitter. Another embodiment of the invention employs an multi-directional infrared emitter array in conjunction with the single front throw emitter.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: January 21, 1997
    Inventor: Lawrence R. Fast
  • Infrared audio transmitter system
    Patent number: 5548654
    Abstract: An infrared assistive listening system capable of enhanced performance in medium-sized locations, such as courtrooms, classrooms, and conference rooms, is realized by a system comprising a pressure zone microphone capable of picking up distant speakers, a high-gain pre-amplifier, an equalization and pre-emphasis circuit, an automatic gain control and limiting circuit, a mute feature capable of remote activation, a FM modulator, a pulse width modulator, and a high-power single front throw infrared emitter. Another embodiment of the invention employs an multi-directional infrared emitter array in conjunction with the single front throw emitter.
    Type: Grant
    Filed: April 7, 1994
    Date of Patent: August 20, 1996
    Inventor: Lawrence R. Fast