Granted Patent
Utility
US 5,694,278 · App. 08/752,823
Keying slots on cartridge
Inventor:
Wayne A. Sumner
Patented Case
View Patent ↗
Granted: Dec 2, 1997
Filed: Nov 20, 1996
Inventor
Wayne A. Sumner
Assignee (at issue)
IO-Mega Holding 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.