Granted Patent
Utility
US 5,251,016 · App. 07/880,861
Chroma keyer with secondary hue selector
Inventor:
James A. Delwiche
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: May 11, 1992
Inventor
James A. Delwiche
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.