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Diphenylimidazole type dyes
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Patent number 4,788,284
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Issue date Nov 29, 1988
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Konishiroku Photo Industry Co., Ltd.
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Toyoaki Masukawa
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C07 - ORGANIC CHEMISTRY
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2551134
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Patent number 2,551,134
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Issue date May 1, 1951
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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2427911
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Patent number 2,427,911
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Issue date Sep 23, 1947
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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2396396
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Patent number 2,396,396
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Issue date Mar 12, 1946
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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2376192
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Patent number 2,376,192
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Issue date May 15, 1945
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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2355691
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Patent number 2,355,691
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Issue date Aug 15, 1944
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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2350812
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Patent number 2,350,812
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Issue date Jun 6, 1944
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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2328652
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Patent number 2,328,652
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Issue date Sep 7, 1943
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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2213787
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Patent number 2,213,787
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Issue date Sep 3, 1940
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C01 - INORGANIC CHEMISTRY
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2192929
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Patent number 2,192,929
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Issue date Mar 12, 1940
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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2186685
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Patent number 2,186,685
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Issue date Jan 9, 1940
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY