Granted Patent
Utility
US 6,405,538 · App. 09/644,770
Gas turbine, gas turbine apparatus, and refrigerant collection method for gas turbine moving blades
Inventors:
Ryou Akiyama, Shinya Marushima, Manabu Matsumoto, Tsuyoshi Takano
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Aug 24, 2000
Inventors
Ryou Akiyama
Shinya Marushima
Manabu Matsumoto
Tsuyoshi Takano
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.