Granted Patent
Utility
US 6,694,968 · App. 10/306,399
Linear multi-oil furnace and heat exchanger
Inventors:
Jacob Dienner, Douglas Stoltzfus, Eli Stauffer, Frederick W. Phillips
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Nov 27, 2002
Inventors
Jacob Dienner
Douglas Stoltzfus
Eli Stauffer
Frederick W. Phillips
Assignee (at issue)
Clean Burn, Inc.
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.