Granted Patent
Utility
US 5,127,975 · App. 07/398,620
Method of fabrication of composite reinforced drive shaft having end fittings secured thereto
Inventors:
Barry L. Zackrisson, John A. Beckman
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Aug 25, 1989
Inventors
Barry L. Zackrisson
John A. Beckman
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.