Granted Patent
Utility
US 4,786,985 · App. 06/899,278
Method and apparatus for extracting binary signals included in vertical blanking intervals of video signals
Inventor:
Marshall Williams
Patented Case
View Patent ↗
Granted: Nov 22, 1988
Filed: Aug 21, 1986
Inventor
Marshall Williams
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.