Granted Patent
Utility
US 6,206,798 · App. 09/390,162
Active differential
Inventor:
Michael E. Johnson
Patented Case
View Patent ↗
Granted: Mar 27, 2001
Filed: Sep 3, 1999
Inventor
Michael E. Johnson
Assignee (at issue)
Meritor Heavy Vehicle Systems 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.