Granted Patent
Utility
US 4,774,576 · App. 06/829,588
Method and apparatus for selectively unblanking special signals inserted in the vertical blanking interval of a television signal
Inventor:
Martin A. Lilley
Patented Case
View Patent ↗
Granted: Sep 27, 1988
Filed: Feb 13, 1986
Inventor
Martin A. Lilley
Assignee (at issue)
Ampex 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.