Granted Patent
Utility
US 4,381,549 · App. 06/196,412
Automatic fault diagnostic apparatus for a heat pump air conditioning system
Inventors:
Custis L. Stamp, Jr., Rollie R. Herzog
Patented Case
View Patent ↗
Granted: Apr 26, 1983
Filed: Oct 14, 1980
Inventors
Custis L. Stamp, Jr.
Rollie R. Herzog
Assignee (at issue)
Trane CAC, Inc.
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.