Granted Patent
Utility
US 4,890,985 · App. 07/236,001
Air conditioning system with variable capacity compressor
Inventor:
Hiroyuki Sugiura
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Aug 24, 1988
Inventor
Hiroyuki Sugiura
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.