Patents by Inventor Donald Eric Arthur Clarke

Donald Eric Arthur Clarke 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).

  • Passive optical network
    Patent number: 5854701
    Abstract: A head-end station (1) is provided for a passive optical network system arranged to transmit downstream TDMA frames and receive upstream TDMA frames. The head-end station (1) comprises a TDMA master (5) and a plurality of optical stages (4a, 4b) connected in common to the TDMA master (5). The TDMA master (5) assembles incoming data into downstream TDMA frames and demultiplexes upstream TDMA frames. Each optical stage (4a, 4b) is arranged to be connected to a different respective fiber network (3a, 3b) and includes an optical transmitter which modulates an optical signal with downstream TDMA frames from the TDMA master (5) together with an optical receiver arranged to detect an optical signal carrying upstream TDMA frames.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: December 29, 1998
    Assignee: British Telecommunications public limited company
    Inventors: Donald Eric Arthur Clarke, Michael Anthony Hale, Jeremy Brian Chuter