Granted Patent
Utility
US 4,889,016 · App. 07/172,722
Hydraulic servo regulating systems in an automatic transmission
Inventors:
Yoshinari Kuwayama, Fumitomo Yokoyama, Masakatsu Miura
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Mar 1, 1988
Inventors
Yoshinari Kuwayama
Fumitomo Yokoyama
Masakatsu Miura
Assignee (at issue)
Aisin-Warner Kabushiki Kaisha
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.