Granted Patent
Utility
US 4,939,905 · App. 07/445,763
Recovery system for differing refrigerants
Inventor:
Kenneth W. Manz
Patented Case
View Patent ↗
Granted: Jul 10, 1990
Filed: Dec 4, 1989
Inventor
Kenneth W. Manz
Assignee (at issue)
Kent-Moore Corporation
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.