Patents by Inventor Nigel Metheringham

Nigel Metheringham 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).

  • Method and apparatus for validating teletext data
    Patent number: 4963968
    Abstract: A teletext decoder comprises a validation circuit for affording an output (V) when valid teletext data pulses are received. The validation circuit comprises an error checking circuit (SR, FCCC, MDCC, RACC) for affording outputs indicative of the number of errors existing in data pulses corresponding to a Framing Code, and Hamming protected magazine and row address data, and a validation check circuit (A, VCC) for affording an output V indicative of valid teletext data having been received when the combined total of said errors does not exceed one.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: October 16, 1990
    Assignee: U.S. Philips Corporation
    Inventors: Richard E. F. Bugg, Nigel Metheringham