Granted Patent
Utility
US 4,307,836 · App. 06/170,902
Pneumatic control means for a vehicle heat exchanger system or the like
Inventor:
Douglas R. Scott
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: Jul 21, 1980
Inventor
Douglas R. Scott
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE LIMITED
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.