Granted Patent
Utility
US 4,379,249 · App. 06/179,718
Incandescent lamp with ellipsoidal envelope and infrared reflector
Inventor:
Peter J. Walsh
Patented Case
View Patent ↗
Granted: Apr 5, 1983
Filed: Aug 20, 1980
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.