Granted Patent
Utility
US 6,238,800 · App. 09/262,048
Lens and an optical apparatus with the lens
Inventor:
Takashi Nishimura
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Mar 4, 1999
Inventor
Takashi Nishimura
Assignee (at issue)
Hitachi Koki 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.