Granted Patent
Utility
US 6,757,331 · App. 09/750,519
Information insertion/detection system
Inventor:
Junya Watanabe
Patented Case
View Patent ↗
Granted: Jun 29, 2004
Filed: Dec 28, 2000
Inventor
Junya Watanabe
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.