Granted Patent
Utility
US 4,626,192 · App. 06/627,038
Primary gas furnace control
Inventor:
Frederick J. Geary
Patented Case
View Patent ↗
Granted: Dec 2, 1986
Filed: Jul 2, 1984
Inventor
Frederick J. Geary
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.