Granted Patent
Utility
US 6,763,123 · App. 09/933,863
Detection of out-of-phase low visibility watermarks
Inventors:
Alastair M. Reed, Jeremy Leigh Cattone
Patented Case
View Patent ↗
Granted: Jul 13, 2004
Filed: Aug 20, 2001
Inventors
Alastair M. Reed
Jeremy Leigh Cattone
Assignee (at issue)
Digimarc 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.