Granted Patent
Utility
US 4,717,321 · App. 06/874,555
Vane compressor with vane back pressure adjustment
Inventors:
Tsunenori Shibuya, Yutaka Ishizuka, Haruhiko Takada, Teruo Nakamura, Hidehiko Takayama
Patented Case
View Patent ↗
Granted: Jan 5, 1988
Filed: Jun 16, 1986
Inventors
Tsunenori Shibuya
Yutaka Ishizuka
Haruhiko Takada
Teruo Nakamura
Hidehiko Takayama
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.