Granted Patent
Utility
US 4,543,049 · App. 06/666,968
Vane compressor with means for obtaining sufficient back pressure upon vanes at the start of compressor
Inventor:
Tsunenori Shibuya
Patented Case
View Patent ↗
Granted: Sep 24, 1985
Filed: Oct 31, 1984
Inventor
Tsunenori Shibuya
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.