Granted Patent
Utility
US 4,350,416 · App. 06/138,932
Compact zoom lens
Inventor:
Shozo Ishiyama
Patented Case
View Patent ↗
Granted: Sep 21, 1982
Filed: Apr 10, 1980
Inventor
Shozo Ishiyama
Assignee (at issue)
Konishiroku Photo Industry Co., Ltd.
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.