Granted Patent
Utility
US 4,401,374 · App. 06/299,513
Interchangeable finder device
Inventors:
Makoto Kimura, Hiroshi Terunuma
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: Sep 4, 1981
Inventors
Makoto Kimura
Hiroshi Terunuma
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.