Patents by Inventor Peter Charles Matthews

Peter Charles Matthews 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 detecting timber defects
    Patent number: 3976384
    Abstract: Apparatus for detecting knots and the like in swan or planed timber comprising means for injecting light into the surface of the timber and means for detecting light emerging from the timber at a location spaced apart from the point or region of injection, a defect such as a knot in the timber, being indicated in dependence upon the amplitude or presence of the light emerging from the timber.
    Type: Grant
    Filed: January 16, 1975
    Date of Patent: August 24, 1976
    Assignee: Plessey Handel und Investments A.G.
    Inventors: Peter Charles Matthews, Brian Herbert Beech