Granted Patent
Utility
US 4,249,793 · App. 06/027,485
Erect type zoom telescopic optical system
Inventor:
Makoto Uehara
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Apr 5, 1979
Inventor
Makoto Uehara
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.