Granted Patent
Utility
US 6,637,921 · App. 09/966,045
Replaceable LED bulb with interchangeable lens optic
Inventor:
Charles M. Coushaine
Patented Case
View Patent ↗
Granted: Oct 28, 2003
Filed: Sep 28, 2001
Inventor
Charles M. Coushaine
Assignee (at issue)
OSRAM SYLVANIA 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.