Granted Patent
Utility
US 5,206,906 · App. 07/816,420
Video scrambling system
Inventor:
Bruce McNair
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Dec 31, 1991
Inventor
Bruce McNair
Assignee (at issue)
AT&T Bell Laboratories
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.