Granted Patent
Utility
US 6,335,503 · App. 09/579,442
Method for manufacturing forging die for making net formed gears with predetermined tooth contact area
Inventor:
Wei-Jiung Tsung
Patented Case
View Patent ↗
Granted: Jan 1, 2002
Filed: May 26, 2000
Inventor
Wei-Jiung Tsung
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.