Granted Patent
Utility
US 4,685,131 · App. 06/710,466
Program blocking method for use in direct broadcast satellite system
Inventor:
Donald R. Horne
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: Mar 11, 1985
Inventor
Donald R. Horne
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.