Granted Patent
Utility
US 5,192,128 · App. 07/709,838
Lensed luminaire with lens brightness control and method
Inventor:
Peter Y. Y. Ngai
Patented Case
View Patent ↗
Granted: Mar 9, 1993
Filed: Jun 4, 1991
Inventor
Peter Y. Y. Ngai
Assignee (at issue)
Peerless Lighting 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.