Granted Patent
Utility
US 4,753,388 · App. 07/077,375
Duty-cycle controlling thermostat construction, system utilizing the same and method of making the same
Inventor:
Kenneth L. Rummage
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Jul 24, 1987
Inventor
Kenneth L. Rummage
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.