Keiichiro Koba

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Patents Grantslast 30 patents

Information Patent Grant
Continuous process for producing long .alpha.-alumina fibers
- Patent number 4,812,271
- Issue date Mar 14, 1989
- Mitsui Mining Company, Limited
- Keiichiro Koba
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Glass-ceramic product and method of making the same
- Patent number 4,777,151
- Issue date Oct 11, 1988
- Mitsui Mining Company, Limited
- Keiichiro Koba
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Alumina-base abrasion resistant material
- Patent number 4,719,188
- Issue date Jan 12, 1988
- Mitsui Mining Co., Ltd.
- Keiichiro Koba
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES