Patents by Inventor Christopher N. Rowsell

Christopher N. Rowsell 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).

  • Testing video equipment
    Patent number: 5343242
    Abstract: A compound video test signal for testing video apparatus, such as a video tape recorder, includes a plurality of at least three blocks each block including a set of constituent test signals, each of the set of constituent test signals being reproduced in corresponding segments in each of the blocks. Preferably, the number of blocks is the largest whole number defined by the number of lines in a video field divided by the product of the number of different constituent test signals and the minimum number of lines per segment required for analysis.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: August 30, 1994
    Assignee: Sony United Kingdom Limited
    Inventors: Christopher N. Rowsell, Stuart R. Monksfield