Granted Patent
Utility
US 6,785,399 · App. 09/300,186
Receiving apparatus, transmitting apparatus, and communication system which utilize a watermark insertion technique
Inventor:
Shiro Fujihara
Patented Case
View Patent ↗
Granted: Aug 31, 2004
Filed: Apr 27, 1999
Inventor
Shiro Fujihara
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.