Yutaka Koyamada

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Glass composition, stem and bulb for lamps
- Patent number 6,528,444
- Issue date Mar 4, 2003
- Matsushita Electric Industrial Co., Ltd.
- Toshifumi Kondoh
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Fluorescent lamp sealed with glass bead
- Patent number 6,229,257
- Issue date May 8, 2001
- Matsushita Electronics Corporation
- Toshifumi Kondoh
- C03 - GLASS MINERAL OR SLAG WOOL