Granted Patent
Utility
US 5,278,699 · App. 07/907,796
Zoom lens system
Inventors:
Takayuki Ito, Sachio Hasushita, Shuji Yoneyama
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Jul 2, 1992
Inventors
Takayuki Ito
Sachio Hasushita
Shuji Yoneyama
Assignee (at issue)
Asahi Kogaku Kogyo 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.