Granted Patent
Utility
US 4,368,549 · App. 06/220,377
Swimming pool heater temperature control system
Inventor:
Robert M. Ramey
Patented Case
View Patent ↗
Granted: Jan 18, 1983
Filed: Dec 29, 1980
Inventor
Robert M. Ramey
Assignee (at issue)
Teledyne Industries, 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.