Granted Patent
Utility
US 4,329,417 · App. 06/158,226
Silver halide photographic material and method of forming high contrast silver images
Inventors:
Toshio Nagatani, Takeshi Habu, Kazuo Takahashi
Patented Case
View Patent ↗
Granted: May 11, 1982
Filed: Jun 10, 1980
Inventors
Toshio Nagatani
Takeshi Habu
Kazuo Takahashi
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.