Granted Patent
Utility
US 4,644,935 · App. 06/652,643
Solar heater control
Inventor:
Daniel M. Gallagher
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: Sep 21, 1984
Inventor
Daniel M. Gallagher
Assignee (at issue)
Rayflow Corp.
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.