Granted Patent
Utility
US 5,146,333 · App. 07/418,353
Self keyer with pre-emphasized fill video
Inventor:
Daniel J. Chaplin
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: Oct 6, 1989
Inventor
Daniel J. Chaplin
Assignee (at issue)
GRASS VALLEY LIMITED
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.