Granted Patent
Utility
US 6,208,735 · App. 09/239,240
Secure spread spectrum watermarking for multimedia data
Inventors:
Ingemar J. Cox, Joseph Kilian, Talal G. Shamoon
Patented Case
View Patent ↗
Granted: Mar 27, 2001
Filed: Jan 28, 1999
Inventors
Ingemar J. Cox
Joseph Kilian
Talal G. Shamoon
Assignee (at issue)
NEC Research Institute, Inc.
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.