Granted Patent
Utility
US 5,809,796 · App. 08/529,083
Self regulating pool heater unit
Inventor:
John M. Zakryk
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: Sep 15, 1995
Inventor
John M. Zakryk
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.