Granted Patent
Utility
US 5,479,913 · App. 08/381,129
Direct contact water heater
Inventor:
Charles L. Adams
Patented Case
View Patent ↗
Granted: Jan 2, 1996
Filed: Jan 31, 1995
Inventor
Charles L. Adams
Assignee (at issue)
PVI Industries, LLC
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.