Granted Patent
Utility
US 4,828,019 · App. 07/120,312
Indoor unit for room air conditioners and air conditioning system using the same
Inventors:
Yutaka Ishizuka, Teruyuki Nagao
Patented Case
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Granted: May 9, 1989
Filed: Nov 13, 1987
Inventors
Yutaka Ishizuka
Teruyuki Nagao
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.