Granted Patent
Utility
US 5,271,556 · App. 07/934,998
Integrated furnace control
Inventors:
Robert W. Helt, Carl L. Garrett, James T. Vershaw
Patented Case
View Patent ↗
Granted: Dec 21, 1993
Filed: Aug 25, 1992
Inventors
Robert W. Helt
Carl L. Garrett
James T. Vershaw
Assignee (at issue)
American Standard Inc.
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.