Granted Patent
Utility
US 4,338,790 · App. 06/123,308
Control and method for defrosting a heat pump outdoor heat exchanger
Inventors:
James F. Saunders, Robert E. Krocker
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Feb 21, 1980
Inventors
James F. Saunders
Robert E. Krocker
Assignee (at issue)
The Trane Company
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.