Granted Patent
Utility
US 4,544,252 · App. 06/585,247
Apparatus for displaying information in camera view finder
Inventor:
Masaaki Tsukamoto
Patented Case
View Patent ↗
Granted: Oct 1, 1985
Filed: Mar 1, 1984
Inventor
Masaaki Tsukamoto
Assignee (at issue)
Nippon Kogaku K.K.
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.