Granted Patent
Utility
US 5,382,980 · App. 08/197,034
Method of and arrangement for inserting a background signal into parts of a foreground signal fixed by a predetermined key color
Inventor:
Rainer Gehrmann
Patented Case
View Patent ↗
Granted: Jan 17, 1995
Filed: Feb 16, 1994
Inventor
Rainer Gehrmann
Assignee (at issue)
U.S. Philips Corporation
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.