Granted Patent
Utility
US 4,364,651 · App. 06/251,750
Exposure ascertaining device for cameras
Inventor:
Fumiaki Hiraike
Patented Case
View Patent ↗
Granted: Dec 21, 1982
Filed: Apr 7, 1981
Inventor
Fumiaki Hiraike
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.