Granted Patent
Utility
US 6,406,253 · App. 09/798,772
Turbocharger
Inventor:
Francis Joseph Geoffrey Heyes
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Mar 2, 2001
Inventor
Francis Joseph Geoffrey Heyes
Assignee (at issue)
ALSTOM Holdings
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.