Takashi Sumigama

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Furnace body structural member for metallurgical shaft furnace
- Patent number 6,258,315
- Issue date Jul 10, 2001
- NKK Corporation
- Tsuneo Araki
- C21 - METALLURGY OF IRON
Information Patent Grant
Stave for metallurgical furnace
- Patent number 6,090,342
- Issue date Jul 18, 2000
- NKK Corporation
- Takashi Sumigama
- C21 - METALLURGY OF IRON
Information Patent Grant
Scrap melting method
- Patent number 5,698,010
- Issue date Dec 16, 1997
- NKK Corporation
- Tatsuro Ariyama
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of producing dimethyl ether
- Patent number 5,466,720
- Issue date Nov 14, 1995
- Fujimoto; Kaoru
- Kaoru Fujimoto
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method of producing dimethyl ether
- Patent number 5,389,689
- Issue date Feb 14, 1995
- Kaoru Fujimoto
- Kaoru Fujimoto
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Simultaneous multi-point sounding apparatus
- Patent number 4,515,350
- Issue date May 7, 1985
- Nippon Kokan Kabushiki Kaisha
- Yoichi Shibata
- C21 - METALLURGY OF IRON