Granted Patent
Utility
US 5,278,936 · App. 07/812,158
Thermostatically controlled portable electric space heater with automatic temperature setback for energy saving
Inventor:
Steve Shao
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Dec 23, 1991
Inventor
Steve Shao
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.