Granted Patent
Utility
US 4,901,536 · App. 07/277,556
Air-conditioner control system
Inventor:
Masahiro Eda
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Nov 29, 1988
Inventor
Masahiro Eda
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.