Granted Patent
Utility
US 5,024,591 · App. 07/352,099
Vane compressor having reduced weight as well as excellent anti-seizure and wear resistance
Inventor:
Nobuyuki Nakajima
Patented Case
View Patent ↗
Granted: Jun 18, 1991
Filed: May 15, 1989
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.