Granted Patent
Utility
US 6,655,153 · App. 09/949,821
Gas turbine shaft and heat shield cooling arrangement
Inventors:
Ryo Akiyama, Shinya Marushima, Manabu Matsumoto, Masami Noda
Patented Case
View Patent ↗
Granted: Dec 2, 2003
Filed: Sep 12, 2001
Inventors
Ryo Akiyama
Shinya Marushima
Manabu Matsumoto
Masami Noda
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.