Granted Patent
Utility
US 4,712,237 · App. 06/665,697
Method and apparatus for unscrambling sync-suppressed television signals
Inventor:
David L. Walker
Patented Case
View Patent ↗
Granted: Dec 8, 1987
Filed: Oct 29, 1984
Inventor
David L. Walker
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.