Granted Patent
Utility
US 4,308,723 · App. 06/050,548
Heat pump employing optimal refrigerant compressor for low pressure ratio applications
Inventor:
Amir L. Ecker
Patented Case
View Patent ↗
Granted: Jan 5, 1982
Filed: Jun 21, 1979
Inventor
Amir L. Ecker
Assignee (at issue)
Atlantic Richfield 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.