Stephen P. Birkeland

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White Bear Lake, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Film supply cassette for camera processor
- Patent number 4,455,076
- Issue date Jun 19, 1984
- Minnesota Mining and Manufacturing Company
- Stephen P. Birkeland
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Semiconductive and sensitized photoconductive compositions
- Patent number 4,222,902
- Issue date Sep 16, 1980
- Minnesota Mining and Manufacturing Company
- William A. Huffman
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Semiconductive and sensitized photoconductive compositions
- Patent number 4,134,764
- Issue date Jan 16, 1979
- Minnesota Mining and Manufacturing Company
- William A. Huffman
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Semiconductive and sensitized photoconductive compositions
- Patent number 4,052,209
- Issue date Oct 4, 1977
- Minnesota Mining and Manufacturing Company
- William A. Huffman
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY