Hiroshi Harada

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Handa, JP

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Patents Grantslast 30 patents

Information Patent Grant
High strength porcelains for use in insulators and production thereof
- Patent number 4,983,556
- Issue date Jan 8, 1991
- NGK Insulators, Ltd.
- Shoji Seike
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Optical fiber-containing insulators
- Patent number 4,810,836
- Issue date Mar 7, 1989
- NGK Insulators, Ltd.
- Katsuro Shinoda
- G02 - OPTICS