Granted Patent
Utility
US 4,755,133 · App. 07/037,641
Primary gas furnace control
Inventor:
Frederick J. Geary
Patented Case
View Patent ↗
Granted: Jul 5, 1988
Filed: Apr 13, 1987
Inventor
Frederick J. Geary
Assignee (at issue)
ROBERTSHAW CONTROLS COMANY
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.