Granted Patent
Utility
US 5,158,747 · App. 07/692,184
Apparatus for identifying and distinguishing different refrigerants
Inventors:
Kenneth W. Manz, Gary P. Murray, Charles E. Dull
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Apr 26, 1991
Inventors
Kenneth W. Manz
Gary P. Murray
Charles E. Dull
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.