Granted Patent
Utility
US 5,285,052 · App. 07/602,274
Control of electrically operated heating systems
Inventor:
Paul Telco
Patented Case
View Patent ↗
Granted: Feb 8, 1994
Filed: Nov 9, 1990
Inventor
Paul Telco
Assignee (at issue)
British Technology Group 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.