Granted Patent
Utility
US 6,796,491 · App. 10/063,102
Electronic payment system, payment apparatus and terminal thereof
Inventor:
Keiichi Nakajima
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Mar 20, 2002
Inventor
Keiichi Nakajima
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.