Granted Patent
Utility
US 4,484,452 · App. 06/506,965
Heat pump refrigerant charge control system
Inventor:
Marion E. Houser, Jr.
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: Jun 23, 1983
Inventor
Marion E. Houser, Jr.
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.