Granted Patent
Utility
US 4,709,997 · App. 06/602,962
Zoom lens
Inventor:
Hidenori Terasawa
Patented Case
View Patent ↗
Granted: Dec 1, 1987
Filed: Apr 23, 1984
Inventor
Hidenori Terasawa
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.