Issei Hayakawa

Person

Tsushima, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Silicon nitride ceramic sintered bodies
- Patent number 5,017,531
- Issue date May 21, 1991
- NGK Insulators, Ltd.
- Noriyuki Ukai
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
High hardness silicon nitride sintered bodies
- Patent number 5,015,608
- Issue date May 14, 1991
- NGK Insulators, Ltd.
- Tadaaki Matsuhisa
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Homogenous silicon nitride sintered body
- Patent number 5,002,907
- Issue date Mar 26, 1991
- NGK Insulators, Ltd.
- Issei Hayakawa
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method of producing homogeneous silicon nitride sintered bodies
- Patent number 4,871,697
- Issue date Oct 3, 1989
- NGK Insulators, Ltd.
- Issei Hayakawa
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Ceramic sintered bodies and a process for manufacturing the same
- Patent number 4,820,665
- Issue date Apr 11, 1989
- NGK Insulators, Ltd.
- Noriyuki Ukai
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method of manufacturing dense cordierite
- Patent number 4,810,681
- Issue date Mar 7, 1989
- NGK Insulators, Ltd.
- Issei Hayakawa
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Polycrystalline transparent spinel sintered body and a method for p...
- Patent number 4,273,587
- Issue date Jun 16, 1981
- NGK Insulators, Ltd.
- Isao Oda
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES

Issei Hayakawa

Person

Patents Grantslast 30 patents

Silicon nitride ceramic sintered bodies

High hardness silicon nitride sintered bodies

Homogenous silicon nitride sintered body

Method of producing homogeneous silicon nitride sintered bodies

Ceramic sintered bodies and a process for manufacturing the same

Method of manufacturing dense cordierite

Polycrystalline transparent spinel sintered body and a method for p...