Granted Patent
Utility
US 6,755,620 · App. 10/077,753
Independent rotational speed control of multi-stage variable speed compressor
Inventors:
Hajime Nakamura, Junichiro Totsuka
Patented Case
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Granted: Jun 29, 2004
Filed: Feb 20, 2002
Inventors
Hajime Nakamura
Junichiro Totsuka
Assignee (at issue)
KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, 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.