Granted Patent
Utility
US 6,826,289 · App. 09/357,223
System for changing attribute of image by electronic watermark
Inventor:
Masahiro Hashimoto
Patented Case
View Patent ↗
Granted: Nov 30, 2004
Filed: Jul 20, 1999
Inventor
Masahiro Hashimoto
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.