Granted Patent
Utility
US 6,066,069 · App. 09/214,567
Control system for an infinitely variable change-speed gear with a torque converter with a lock-up clutch
Inventor:
Ralf Vorndran
Patented Case
View Patent ↗
Granted: May 23, 2000
Filed: Jan 7, 1999
Inventor
Ralf Vorndran
Assignee (at issue)
ZF Friedrichshafen AG
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.