Patents by Inventor John Roschen

John Roschen 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).

  • Two-color photoelectric detectors having an integral filter
    Patent number: 3962578
    Abstract: Two photoelectric detector elements, having substantially different response wavelengths, are mounted in a housing in cascade relationship. The outer element is selected to be transparent to the response wavelength of the inner element and it is provided with an integral filter that is transmissive at the response wavelength of the inner element. Anti-reflective coatings are used to minimize reflective losses.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: June 8, 1976
    Assignee: Aeronutronic Ford Corporation
    Inventor: John Roschen