Granted Patent
Utility
US 4,922,171 · App. 07/406,969
Motor actuator with air-mix door opening-limiter and built-in switching unit
Inventor:
Shinichi Ohi
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Sep 13, 1989
Inventor
Shinichi Ohi
Assignee (at issue)
Diesel Kiki Co., Ltd.
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.