Granted Patent
Utility
US 4,943,216 · App. 07/428,043
Sliding-vane rotary compressor
Inventor:
Masahiro Iio
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: Oct 27, 1989
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.