Granted Patent
Utility
US 6,108,434 · App. 08/928,576
Counteracting geometric distortions for DCT based watermarking
Inventors:
Ingemar J. Cox, Matthew L. Miller
Patented Case
View Patent ↗
Granted: Aug 22, 2000
Filed: Sep 12, 1997
Inventors
Ingemar J. Cox
Matthew L. Miller
Assignee (at issue)
Signafy, 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.