Granted Patent
Utility
US 4,970,581 · App. 07/242,929
Circuit for and method of detecting color field sequence in a color video signal
Inventor:
David O'Gwynn
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Sep 9, 1988
Inventor
David O'Gwynn
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.