Granted Patent
Utility
US 4,192,682 · App. 05/869,630
Process of forming a high-contrast silver image
Inventors:
Yoshio Nishina, Syunji Matsuo, Toshio Nagatani, Kazuo Takahashi, Takeshi Habu
Patented Case
View Patent ↗
Granted: Mar 11, 1980
Filed: Jan 16, 1978
Inventors
Yoshio Nishina
Syunji Matsuo
Toshio Nagatani
Kazuo Takahashi
Takeshi Habu
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.