Granted Patent
Utility
US 6,320,722 · App. 09/688,866
Cartridge mis-insertion preventing mechanism
Inventors:
Manabu Tsuchiya, Toshimitsu Kawasaki
Patented Case
View Patent ↗
Granted: Nov 20, 2001
Filed: Oct 17, 2000
Inventors
Manabu Tsuchiya
Toshimitsu Kawasaki
Assignee (at issue)
NEC 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.