IP Library Granted Patent US 4,917,991
Granted Patent Utility
US 4,917,991 · App. 07/210,397

Direct positive silver halide photographic material

Inventors: Yasuo Tosaka, Keiji Ogi, Atushi Kamitakahara
Patented Case View Patent ↗
Granted: Apr 17, 1990 Filed: Jun 23, 1988
Inventors
Yasuo Tosaka
Keiji Ogi
Atushi Kamitakahara
Assignee (at issue)
Konishiroku Photo Industry Co., Ltd.

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Quick Facts
Patent No.
US 4,917,991
App. No.
07/210,397
Filed
1988-06-23
Granted
1990-04-17
Kind
A