Granted Patent
Utility
US 4,304,845 · App. 06/161,583
Silver halide photographic materials containing photographic yellow coupler
Inventors:
Wataru Fujimatsu, Shui Sato, Tamotsu Kojima, Shigemasa Itoh, Takaya Endo
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: Jun 20, 1980
Inventors
Wataru Fujimatsu
Shui Sato
Tamotsu Kojima
Shigemasa Itoh
Takaya Endo
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.