Patents by Inventor Andrew R. Hunwicks

Andrew R. Hunwicks 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).

  • Two-way optical communications system
    Patent number: 5305133
    Abstract: An optical communications system comprises a transceiver arranged to provide two-way communication over an optical communications channel (3). The transceiver comprises a semiconductor light source (4) and a detector (5). The semiconductor light source (4) provides optical signals for transmission via the optical communications channel (3), and the detector (5) detects optical signals received via the optical communications channel and converts said optical signals into electrical signals. Means (2)a, (2)b) are provided for modulating the output of the semiconductor light source (4) with an RF carrier having a first frequency. Said electrical signals are passed through filter (8) adapted to filter out signals at said first frequency.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: April 19, 1994
    Assignee: British Telecommunications public limited company
    Inventors: Anthony J. Cooper, Andrew R. Hunwicks, Lawrence Bickers