Granted Patent
Utility
US 4,406,322 · App. 06/150,920
Heating and/or cooling system
Inventors:
Guglielmo Rossi, Ursula Eysholdt, Gerd Mulier
Patented Case
View Patent ↗
Granted: Sep 27, 1983
Filed: May 19, 1980
Inventors
Guglielmo Rossi
Ursula Eysholdt
Gerd Mulier
Assignee (at issue)
RANCO CO., Ltd.
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.