Granted Patent
Utility
US 6,183,386 · App. 08/775,045
Differential containing rheological fluid
Inventor:
James A. Duggan
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Dec 27, 1996
Inventor
James A. Duggan
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.