Granted Patent
Utility
US 4,530,578 · App. 06/608,820
Variable magnification observation apparatus
Inventor:
Kinya Kato
Patented Case
View Patent ↗
Granted: Jul 23, 1985
Filed: May 10, 1984
Inventor
Kinya Kato
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.