Granted Patent
Utility
US 5,223,697 · App. 07/803,204
Electric radiant heater
Inventors:
Eugen Wilde, Erich Wagner, Leonhard Doerner, Robert Kicherer
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Dec 6, 1991
Inventors
Eugen Wilde
Erich Wagner
Leonhard Doerner
Robert Kicherer
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.