Granted Patent
Utility
US 6,481,844 · App. 09/750,062
Apparatus, method and medium for providing an optical effect
Inventor:
Peter Douglas Beery
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Dec 29, 2000
Inventor
Peter Douglas Beery
Assignee (at issue)
Nortel Networks 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.