Granted Patent
Utility
US 4,827,253 · App. 07/249,215
Video compositing using a software linear keyer
Inventor:
Ivan Maltz
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Sep 26, 1988
Inventor
Ivan Maltz
Assignee (at issue)
Dubner Computer Systems, Inc.
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.