Granted Patent
Utility
US 4,389,098 · App. 06/181,615
Zoom lens barrel
Inventor:
Syousuke Fukushima
Patented Case
View Patent ↗
Granted: Jun 21, 1983
Filed: Aug 26, 1980
Inventor
Syousuke Fukushima
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.