Granted Patent
Utility
US 4,668,172 · App. 06/783,834
Compressor having discharge valve means adapted to enhance the coefficient of performance of the compressor
Inventors:
Tsunenori Shibuya, Yutaka Ishizuka
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Oct 3, 1985
Inventors
Tsunenori Shibuya
Yutaka Ishizuka
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.