Granted Patent
Utility
US 6,203,465 · App. 09/439,439
Transfer case with four-wheel underdrive operating mode
Inventor:
Dan J. Showalter
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Nov 15, 1999
Inventor
Dan J. Showalter
Assignee (at issue)
BorgWarner 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.