Granted Patent
Utility
US 6,652,344 · App. 10/260,452
High intensity discharge lamp with single crystal sapphire envelope
Inventors:
Bernard J. Eastlund, Maurice Levis
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Sep 27, 2002
Inventors
Bernard J. Eastlund
Maurice Levis
Assignee (at issue)
Gem Lighting, LLC
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.