Granted Patent
Utility
US 6,833,935 · App. 09/769,469
Image reading device
Inventor:
Yasuhiro Yamamoto
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Jan 26, 2001
Inventor
Yasuhiro Yamamoto
Assignee (at issue)
Pentax Corporation
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.