Granted Patent
Utility
US 4,841,569 · App. 07/139,459
Secure video distribution system
Inventor:
David E. Wachob
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Dec 30, 1987
Inventor
David E. Wachob
Assignee (at issue)
General Instrument 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.