Granted Patent
Utility
US 5,048,176 · App. 07/385,008
Method of making a radiant heater
Inventor:
Leonhard Doerner
Patented Case
View Patent ↗
Granted: Sep 17, 1991
Filed: Jul 25, 1989
Inventor
Leonhard Doerner
Assignee (at issue)
E.G.O. Elektro-Gerate Blanc u. Fischer
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.