Granted Patent
Utility
US 6,690,795 · App. 08/810,442
Multiple keys for decrypting data in restricted-access television system
Inventor:
William Richards
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: Mar 4, 1997
Inventor
William Richards
Assignee (at issue)
LUCENT TECHNOLOGIES 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.