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Exposure control unit
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Patent number 4,609,275
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Issue date Sep 2, 1986
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Copal Company Limited
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Yasuo Ishiguro
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Electric shutter for cameras
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Patent number 4,222,652
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Issue date Sep 16, 1980
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Copal Company Limited
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Yasuo Ishiguro
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Digital shutter control circuit
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Patent number 4,193,673
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Issue date Mar 18, 1980
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Copal Company Limited
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Yasuo Ishiguro
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Driving circuit for camera shutters
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Patent number 4,190,344
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Issue date Feb 26, 1980
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Copal Company Limited
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Yasuo Ishiguro
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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