Granted Patent
Utility
US 6,640,886 · App. 10/198,224
Heat exchanger tube, heat exchanger and method of making the same
Inventor:
Bernhard Lamich
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Jul 18, 2002
Inventor
Bernhard Lamich
Assignee (at issue)
MODINE MANUFACTURING COMPANY
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.