Granted Patent
Utility
US 4,478,210 · App. 06/030,351
Solar heating system
Inventor:
Leonard M. Sieradski
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Apr 16, 1979
Inventor
Leonard M. Sieradski
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.