Granted Patent
Utility
US 6,154,571 · App. 09/118,467
Robust digital watermarking
Inventors:
Ingemar J. Cox, Matthew L. Miller, Ryoma Oami
Patented Case
View Patent ↗
Granted: Nov 28, 2000
Filed: Jul 17, 1998
Inventors
Ingemar J. Cox
Matthew L. Miller
Ryoma Oami
Assignees (at issue)
NEC Research Institute, Inc.
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.