Granted Patent
Utility
US 4,243,871 · App. 05/866,554
Fluid heating system with storage of electric heat
Inventor:
James L. McKenney
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Jan 3, 1978
Inventor
James L. McKenney
Assignee (at issue)
VAPOR 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.