Granted Patent
Utility
US 4,815,362 · App. 07/125,985
Diffuser unit for air conditioning system
Inventors:
Yutaka Ishizuka, Masanori Kaizaki, Shigeo Tanaka
Patented Case
View Patent ↗
Granted: Mar 28, 1989
Filed: Nov 27, 1987
Inventors
Yutaka Ishizuka
Masanori Kaizaki
Shigeo Tanaka
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.