Granted Patent
Utility
US 6,324,931 · App. 09/552,314
Straight bevel gears with improved tooth root area geometry and method for manufacturing forging die for making thereof
Inventor:
Wei-Jiung Tsung
Patented Case
View Patent ↗
Granted: Dec 4, 2001
Filed: Apr 19, 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.