Granted Patent
Utility
US 5,169,359 · App. 07/807,192
Constant/variable speed gear assembly
Inventor:
Kyung Soo Han
Patented Case
View Patent ↗
Granted: Dec 8, 1992
Filed: Dec 16, 1991
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.