Granted Patent
Utility
US 4,478,500 · App. 06/348,744
Exposure controlling device adapted to cameras using interchangeable lenses
Inventor:
Yasuo Ishiguro
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Feb 16, 1982
Inventor
Yasuo Ishiguro
Assignees (at issue)
Copal Company Limited
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.