Granted Patent
Utility
US 4,828,168 · App. 07/178,346
Method of controlling duct-type air conditioning system
Inventor:
Chuya Odajima
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Apr 6, 1988
Inventor
Chuya Odajima
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.