Granted Patent
Utility
US 6,478,557 · App. 09/848,442
Scroll compressor suitable for a low operating pressure ratio
Inventors:
Masao Shiibayashi, Yasushi Izunaga, Katsuaki Yano
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: May 4, 2001
Inventors
Masao Shiibayashi
Yasushi Izunaga
Katsuaki Yano
Assignee (at issue)
HITACHI, 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.