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John L. Wirth
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Syracuse, NY, US
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last 30 patents
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Patent Grant
Shutterless optical system for viewing motion pictures
Patent number
4,405,218
Issue date
Sep 20, 1983
John L. Wirth
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Patent Grant
Halftone contact screen and photographic method of making the screen
Patent number
4,308,326
Issue date
Dec 29, 1981
John L. Wirth
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY