Granted Patent
Utility
US 5,647,814 · App. 08/477,378
Four pinion mate differential gear assembly having a one-piece differential case
Inventor:
James A. Krisher
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: Jun 7, 1995
Inventor
James A. Krisher
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.