Granted Patent
Utility
US 6,012,514 · App. 08/978,986
Tube-in tube heat exchanger
Inventor:
Robert Swain
Patented Case
View Patent ↗
Granted: Jan 11, 2000
Filed: Nov 26, 1997
Inventor
Robert Swain
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.