Granted Patent
Utility
US 6,768,808 · App. 10/318,345
Encoding and decoding methods in which decryption data is conveyed steganographically within audio or visual content
Inventor:
Geoffrey B. Rhoads
Patented Case
View Patent ↗
Granted: Jul 27, 2004
Filed: Dec 9, 2002
Inventor
Geoffrey B. Rhoads
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.