Granted Patent
Utility
US 4,840,881 · App. 07/223,713
Process for the production of light-sensitive silver halide photographic material
Inventors:
Yoshikazu Watanabe, Motoaki Tanaka
Patented Case
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Granted: Jun 20, 1989
Filed: Jul 21, 1988
Inventors
Yoshikazu Watanabe
Motoaki Tanaka
Assignee (at issue)
Konishiroku Photo Industry Co., Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.