Granted Patent
Utility
US 4,367,726 · App. 06/197,415
Solar hot water heater
Inventor:
Reed E. Maes, Jr.
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Oct 16, 1980
Inventor
Reed E. Maes, Jr.
Assignee (at issue)
Environmental Research Institute
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.