Granted Patent
Utility
US 6,581,583 · App. 10/146,757
Engine intake off gas heater
Inventor:
John Leen
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: May 16, 2002
Inventor
John Leen
Assignee (at issue)
HURON CONSULTING GROUP
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.