Granted Patent
Utility
US 5,817,192 · App. 08/737,834
High-strength and high-toughness heat-resisting steel
Inventors:
Hisataka Kawai, Toshio Sakon, Yoshikuni Kadoya, Ichirou Tsuji, Ryotarou Magoshi
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Nov 21, 1996
Inventors
Hisataka Kawai
Toshio Sakon
Yoshikuni Kadoya
Ichirou Tsuji
Ryotarou Magoshi
Assignee (at issue)
MITSUBISHI KOGYO KABUSHIKI KAISHA
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.