Granted Patent
Utility
US 4,689,682 · App. 06/922,589
Method and apparatus for carrying out television special effects
Inventor:
Richard A. Jackson
Patented Case
View Patent ↗
Granted: Aug 25, 1987
Filed: Oct 24, 1986
Inventor
Richard A. Jackson
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.