Granted Patent
Utility
US 5,933,798 · App. 08/895,250
Detecting a watermark embedded in an information signal
Inventor:
Johan Paul Marie Gerard Linnartz
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: Jul 16, 1997
Inventor
Johan Paul Marie Gerard Linnartz
Assignee (at issue)
U.S. Philips 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.