Patents by Inventor Robin Rowley

Robin Rowley 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).

  • Fault detection in a full duplex optical communications system
    Patent number: 4833668
    Abstract: An optical duplex system may continue to operate after a break in a fibre if light is reflected at the break and received back at the transmitting station, and that station is unable to identify the origin of the data. To prevent this, in a simple 2-channel duplex system, data transmitted from one end is inverted prior to transmission and reinverted at the receiving end, while information from the other end is transmitted and received without inversion. If there is a break, the stations at both ends will receive inverted data and the fault is quickly revealed. In a 2.times.4 channel multiplex system, one channel from one end is inverted before transmission, while three channels from the opposite end are inverted before transmission.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: May 23, 1989
    Assignee: British Telecommunications public limited company
    Inventors: Robin Rowley, Gregory P. Coombs