Granted Patent
Utility
US 5,572,276 · App. 08/339,186
Inner focus type telephoto zoom lens
Inventor:
Jun Hirakawa
Patented Case
View Patent ↗
Granted: Nov 5, 1996
Filed: Nov 10, 1994
Inventor
Jun Hirakawa
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.