Granted Patent
Utility
US 4,802,830 · App. 07/139,646
Vane compressor without occurrence of vane chattering
Inventor:
Nobuyuki Nakajima
Patented Case
View Patent ↗
Granted: Feb 7, 1989
Filed: Dec 29, 1987
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.