Granted Patent
Utility
US 6,378,167 · App. 09/457,633
Method of installing an oil pan heater on an oil pan mounted on an engine block
Inventors:
Edward H. Howell, III, Roger Porter
Patented Case
View Patent ↗
Granted: Apr 30, 2002
Filed: Dec 8, 1999
Inventors
Edward H. Howell, III
Roger Porter
Assignee (at issue)
Navistar International Transportation
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.