Granted Patent
Utility
US 4,611,242 · App. 06/607,988
Two mode scrambling system using identifier pulse in vertical blanking interval
Inventor:
Gregory A. Williams
Patented Case
View Patent ↗
Granted: Sep 9, 1986
Filed: May 7, 1984
Inventor
Gregory A. Williams
Assignee (at issue)
Zenith Electronics LLC
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.