Granted Patent
Utility
US 4,948,950 · App. 07/343,015
Heating system, control device therefor and methods of making the same
Inventor:
Richard H. Rae
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Apr 25, 1989
Inventor
Richard H. Rae
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.