Granted Patent
Utility
US 4,745,822 · App. 06/725,452
Two speed axle
Inventors:
Edward G. Trachman, Daniel W. Roper
Patented Case
View Patent ↗
Granted: May 24, 1988
Filed: Apr 19, 1985
Inventors
Edward G. Trachman
Daniel W. Roper
Assignee (at issue)
Rockwell International Corporation
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.