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Frankfurt am Main, DE
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last 30 patents
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Patent Grant
Image reversal process utilizing a positive-working photosensitive...
Patent number
5,066,567
Issue date
Nov 19, 1991
Hoechst Aktiengesellschaft
Hans-Joachim Merrem
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Patent Grant
Positive-working photosensitive composition containing a dye and po...
Patent number
4,927,732
Issue date
May 22, 1990
Hoechst Aktiengesellschaft
Hans-Joachim Merrem
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY