Granted Patent
Utility
US 4,818,189 · App. 06/931,217
Variable capacity vane compressor
Inventor:
Nobuyuki Nakajima
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Nov 14, 1986
Inventor
Nobuyuki Nakajima
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.