Granted Patent
Utility
US 4,728,848 · App. 06/319,223
Energy-efficient incandescent reflector lamp
Inventor:
Peter J. Walsh
Patented Case
View Patent ↗
Granted: Mar 1, 1988
Filed: Nov 9, 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.