Granted Patent
Utility
US 4,792,716 · App. 06/316,228
Energy-efficient electric discharge lamp with reflective coating
Inventor:
Peter J. Walsh
Patented Case
View Patent ↗
Granted: Dec 20, 1988
Filed: Oct 29, 1981
Inventor
Peter J. Walsh
Assignee (at issue)
Duro-Test 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.