Granted Patent
Utility
US 4,323,764 · App. 06/170,716
Control system and control device for controlling a heating unit and method of making and operating the same
Inventors:
James R. Willson, William H. Conway, William N. Smith
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Jul 21, 1980
Inventors
James R. Willson
William H. Conway
William N. Smith
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.