Granted Patent
Utility
US 6,589,035 · App. 08/942,737
Scroll compressor having a valved back-pressure chamber and a bypass for over-compression
Inventors:
Isamu Tsubono, Masahiro Takebayashi, Isao Hayase, Koichi Inaba, Koichi Sekiguchi, Kenichi Oshima, Atsushi Shimada, Takehiro Akizawa
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Oct 3, 1997
Inventors
Isamu Tsubono
Masahiro Takebayashi
Isao Hayase
Koichi Inaba
Koichi Sekiguchi
Kenichi Oshima
Atsushi Shimada
Takehiro Akizawa
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.