Granted Patent
Utility
US 6,648,792 · App. 10/123,704
Family of multi-speed transmission mechanisms with three planetary gear sets and a stationary member
Inventors:
Patrick B. Usoro, Madhusudan Raghavan, Norman K. Bucknor
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Apr 16, 2002
Inventors
Patrick B. Usoro
Madhusudan Raghavan
Norman K. Bucknor
Assignee (at issue)
General Motors LLC
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.