Granted Patent
Utility
US 4,418,548 · App. 06/362,830
Variable capacity multiple compressor refrigeration system
Inventor:
George N. Sawyer
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Mar 29, 1982
Inventor
George N. Sawyer
Assignee (at issue)
Trane CAC, Inc.
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.