Fumio Kawahara

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Yamagata, JP

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Patents Grantslast 30 patents

Information Patent Grant
Flame retardant diaphragm for acoustic transducers
- Patent number 4,472,543
- Issue date Sep 18, 1984
- Pioneer Electronic Corporation
- Kazuo Tsuchiya
- D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
Information Patent Grant
Flame-retarded acoustic diaphragm
- Patent number 4,451,609
- Issue date May 29, 1984
- Pioneer Electronic Corporation
- Fumio Kawahara
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE