Granted Patent
Utility
US 6,253,033 · App. 09/407,854
Eyepiece optical system for a single lens reflex camera
Inventor:
Sachio Hasushita
Patented Case
View Patent ↗
Granted: Jun 26, 2001
Filed: Sep 29, 1999
Inventor
Sachio Hasushita
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.