Granted Patent
Utility
US 6,278,781 · App. 09/339,314
Wireless telephony with steganography
Inventor:
Geoffrey B. Rhoads
Patented Case
View Patent ↗
Granted: Aug 21, 2001
Filed: Jun 23, 1999
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.