Granted Patent
Utility
US 4,688,389 · App. 06/840,626
Automotive air-conditioning system
Inventor:
Katsumi Iida
Patented Case
View Patent ↗
Granted: Aug 25, 1987
Filed: Mar 17, 1986
Inventor
Katsumi Iida
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.