Granted Patent
Utility
US 6,644,308 · App. 10/075,992
Helmet
Inventors:
David Kalhok, Pierre Rondeau, Martin Aubé, Germain Cadotte
Patented Case
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Granted: Nov 11, 2003
Filed: Feb 15, 2002
Inventors
David Kalhok
Pierre Rondeau
Martin Aubé
Germain Cadotte
Assignee (at issue)
BOMBARDIER 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.