Granted Patent
Utility
US 4,872,375 · App. 06/751,402
Control method for planetary transmission having four element torque converter
Inventors:
Edward G. Trachman, Shan Shih, John Arzoian
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Jul 3, 1985
Inventors
Edward G. Trachman
Shan Shih
John Arzoian
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.