Granted Patent
Utility
US 6,427,639 · App. 09/206,828
Method and apparatus for warming intake air to an internal combustion engine
Inventors:
Craig C. Andrews, Oliver J. Murphy
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Dec 7, 1998
Inventors
Craig C. Andrews
Oliver J. Murphy
Assignee (at issue)
Lynntech, 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.