Granted Patent
Utility
US 4,657,351 · App. 06/720,083
High magnification change rate zoom lens system
Inventor:
Susumu Mori
Patented Case
View Patent ↗
Granted: Apr 14, 1987
Filed: Apr 4, 1985
Inventor
Susumu Mori
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.