Granted Patent
Utility
US 5,392,639 · App. 08/077,279
Apparatus and method for identifying and distinguishing different refrigerants
Inventor:
Kenneth W. Manz
Patented Case
View Patent ↗
Granted: Feb 28, 1995
Filed: Jun 17, 1993
Inventor
Kenneth W. Manz
Assignee (at issue)
SPX 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.