Patents by Inventor Bill Cawlfield

Bill Cawlfield 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 Repeater System
    Publication number: 20100258729
    Abstract: An infrared sensor includes a photodiode receiving an infrared signal. A first amplifier is connected to the photodiode. A second amplifier is connected to the first amplifier. A DC servo is connected in a feedback loop between the output of the second amplifier and the positive side of the first amplifier. An analog-to-digital signal converter is connected to the second amplifier. An output driver is connected to the analog-to-digital signal converter. The infrared sensor may receive and retransmit an infrared signal and may be incorporated in an infrared repeater system.
    Type: Application
    Filed: April 13, 2009
    Publication date: October 14, 2010
    Applicant: NILES AUDIO CORPORATION
    Inventors: Alastair Roxburgh, Richard Lenser, Bill Cawlfield