Granted Patent
Utility
US 6,257,041 · App. 09/643,416
Method of forming a one-piece steering shaft member
Inventor:
James A. Duggan
Patented Case
View Patent ↗
Granted: Jul 10, 2001
Filed: Aug 22, 2000
Inventor
James A. Duggan
Assignee (at issue)
Spicer Driveshaft, Inc.
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.