Granted Patent
Utility
US 4,489,680 · App. 06/573,188
Engine temperature control system
Inventors:
Romas B. Spokas, Fred D. Sturges
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Jan 23, 1984
Inventors
Romas B. Spokas
Fred D. Sturges
Assignee (at issue)
BorgWarner 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.