Granted Patent
Utility
US 6,640,469 · App. 10/157,501
Snow blower vehicle and method for improving snow blower vehicle performance
Inventors:
Ian Daniel McKenzie, Jeffery S. Hawkins, David Brunette, Richard M. Avery, Jr.
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: May 29, 2002
Inventors
Ian Daniel McKenzie
Jeffery S. Hawkins
David Brunette
Richard M. Avery, Jr.
Assignee (at issue)
DETROIT DIESEL CORPORATION
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.