Granted Patent
Utility
US 6,059,680 · App. 09/296,395
Speed sensitive on-demand torque coupling differential
Inventor:
Jun Yoshioka
Patented Case
View Patent ↗
Granted: May 9, 2000
Filed: Apr 23, 1999
Inventor
Jun Yoshioka
Assignee (at issue)
DANA LIMITED
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.