Granted Patent
Utility
US 6,494,600 · App. 09/849,310
High thermal diffusion efficiency light device
Inventors:
Don Liang, Kan-Chuan Cheng
Patented Case
View Patent ↗
Granted: Dec 17, 2002
Filed: May 7, 2001
Inventors
Don Liang
Kan-Chuan Cheng
Assignee (at issue)
BenQ 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.