Granted Patent
Utility
US 6,229,653 · App. 09/459,632
Variable-power eyepiece optical system
Inventor:
Moriyasu Kanai
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Dec 13, 1999
Inventor
Moriyasu Kanai
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.