Granted Patent
Utility
US 4,823,183 · App. 07/150,598
Video mixer with multicolor boarder
Inventors:
Richard A. Jackson, John Abt
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Feb 1, 1988
Inventors
Richard A. Jackson
John Abt
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.