Patents by Inventor Ian Godfrey Fobbester

Ian Godfrey Fobbester 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).

  • Control arrangements for digital radio receivers
    Patent number: 5663989
    Abstract: In a frequency modulated digital radio transmission system, frequency differences between transmitter and receiver which give rise to DC offsets at the output of the demodulator are countered for any one data transmission by establishing a frequency controlling or DC level controlling signal during a preamble sequence having a known constant DC component, such as the sequence 10101 - - - used for clock or data synchronization, and retaining that controlling signal substantially unaltered for use during the remainder of that data transmission.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: September 2, 1997
    Assignee: Plessey Semiconductors Limited
    Inventor: Ian Godfrey Fobbester