Granted Patent
Utility
US 5,405,458 · App. 08/120,523
Method of producing hard film of Ti-Si-N composite material
Inventors:
Hiroshi Yamagata, Tadashi Yamaguchi, Hideki Takeda, Nobuyuki Nishiyama, Katsutoshi Nozaki, Akihisa Inoue, Tsuyoshi Masumoto
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: Sep 14, 1993
Inventors
Hiroshi Yamagata
Tadashi Yamaguchi
Hideki Takeda
Nobuyuki Nishiyama
Katsutoshi Nozaki
Akihisa Inoue
Tsuyoshi Masumoto
Assignees (at issue)
Yoshida Kogyo K.K.
Tsuyoshi Masumoto
Akihisa Inoue
HONDA MOTOR CO., LTD.
Teikoko Piston Ring Co., 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.