Granted Patent
Utility
US 4,834,634 · App. 07/209,643
Sliding-vane rotary compressor for bearing lubrication
Inventor:
Mitsuya Ono
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Jun 21, 1988
Inventor
Mitsuya Ono
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.