Granted Patent
Utility
US 6,435,819 · App. 09/925,539
Turbo machines
Inventors:
Kouichi Irie, Tomoyoshi Okamura, Akira Manabe, Junichi Kurokawa
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: Aug 10, 2001
Inventors
Kouichi Irie
Tomoyoshi Okamura
Akira Manabe
Junichi Kurokawa
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.