Granted Patent
Utility
US 4,984,877 · App. 07/535,234
High zoom-ratio/zoom lens system for use in a compact camera
Inventor:
Takayuki Ito
Patented Case
View Patent ↗
Granted: Jan 15, 1991
Filed: Jun 8, 1990
Inventor
Takayuki Ito
Assignee (at issue)
Asahi Kogaku Kogyo Kabushiki Kaisha
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.