Granted Patent
Utility
US 4,815,953 · App. 07/083,677
Seizure-free vane rotary compressor with vanes, rotor and side blocks made of Si-Al alloy material
Inventor:
Masahiro Iio
Patented Case
View Patent ↗
Granted: Mar 28, 1989
Filed: Aug 7, 1987
Inventor
Masahiro Iio
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.