Granted Patent
Utility
US 6,733,238 · App. 10/079,853
Axial-flow turbine having stepped portion formed in axial-flow turbine passage
Inventors:
Takashi Hiyama, Eisaku Ito
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: Feb 22, 2002
Inventors
Takashi Hiyama
Eisaku Ito
Assignee (at issue)
MITSUBISHI ELECTRIC CORPORATION
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.