Patents by Inventor Christopher Ernest Peterson

Christopher Ernest Peterson 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 of and apparatus for testing a two dimensional pattern
    Patent number: 4006296
    Abstract: A method of and apparatus for testing a two dimensional pattern uses a pair of pick-up devices for scanning a reference pattern and the pattern to be tested. The reference pattern is modified relative to the test pattern and includes three types of pattern traces, i.e. narrow black traces, narrow bright traces and intermediate wide grey traces. The pattern is tested by means of the narrow traces only thereby minimizing positioning and scanning problems.
    Type: Grant
    Filed: June 26, 1975
    Date of Patent: February 1, 1977
    Assignee: U.S. Philips Corporation
    Inventor: Christopher Ernest Peterson