Granted Patent
Utility
US 6,019,171 · App. 09/195,114
Down flow, two pass radiator with automatic air venting means
Inventor:
Colin Johnson
Patented Case
View Patent ↗
Granted: Feb 1, 2000
Filed: Nov 18, 1998
Inventor
Colin Johnson
Assignee (at issue)
General Motors 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.