Granted Patent
Utility
US 6,141,063 · App. 08/937,312
Chroma key method and arrangement
Inventor:
Rainer Gehrmann
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Sep 22, 1997
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.