Granted Patent
Utility
US 6,647,932 · App. 10/175,889
Compact boiler with tankless heater for providing heat and domestic hot water
Inventors:
Shuqing Cui, Neil Rolph, Ayman Abdel-Rehim
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Jun 21, 2002
Inventors
Shuqing Cui
Neil Rolph
Ayman Abdel-Rehim
Assignee (at issue)
United Dominion Industries, 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.