Granted Patent
Utility
US 6,648,787 · App. 10/154,370
Traction drive transmission
Inventor:
Dan Coffey
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: May 23, 2002
Inventor
Dan Coffey
Assignee (at issue)
General Motors LLC
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.