Granted Patent
Utility
US 4,441,798 · App. 06/433,021
Camera having a liquid crystal focusing screen
Inventors:
Koji Watanabe, Yoshihiro Higuchi, Michio Yagi, Kazuo Shiozawa
Patented Case
View Patent ↗
Granted: Apr 10, 1984
Filed: Oct 6, 1982
Inventors
Koji Watanabe
Yoshihiro Higuchi
Michio Yagi
Kazuo Shiozawa
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.