Granted Patent
Utility
US 6,068,570 · App. 09/336,597
Variable speed transmission system and differential
Inventor:
Kyung Soo Han
Patented Case
View Patent ↗
Granted: May 30, 2000
Filed: Jun 21, 1999
Inventor
Kyung Soo Han
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.