Granted Patent
Utility
US 4,265,299 · App. 06/079,859
Heat pump control system
Inventor:
James R. Harnish
Patented Case
View Patent ↗
Granted: May 5, 1981
Filed: Sep 28, 1979
Inventor
James R. Harnish
Assignee (at issue)
BorgWarner 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.