Katsutoki Hanayama

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Saitama-ken, JP

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Patents Grantslast 30 patents

Information Patent Grant
Acoustic device
- Patent number 6,792,122
- Issue date Sep 14, 2004
- Pioneer Corporation
- Haruo Okada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Speaker system
- Patent number 5,590,208
- Issue date Dec 31, 1996
- Pioneer Electronic Corporation
- Shinji Koyano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE