Toshifumi Kato

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Yamagata-ken, JP

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Patents Grantslast 30 patents

Information Patent Grant
Speaker and method of assembling the speaker
- Patent number 6,672,423
- Issue date Jan 6, 2004
- Pioneer Corporation
- Toshifumi Kato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Diaphragm for speaker and speaker device provided with the same
- Patent number 6,474,440
- Issue date Nov 5, 2002
- Pioneer Corporation
- Toshifumi Kato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Loudspeaker
- Patent number 6,236,733
- Issue date May 22, 2001
- Pioneer Electronic Corporation
- Toshifumi Kato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Speaker device
- Publication number 20070269075
- Publication date Nov 22, 2007
- Pioneer Corporation
- Toshifumi Kato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Speaker
- Publication number 20060269094
- Publication date Nov 30, 2006
- PIONEER CORPORATION
- Toshifumi Kato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Speaker
- Publication number 20060093182
- Publication date May 4, 2006
- PIONEER CORPORATION
- Toshifumi Kato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Speaker and method of assembling the speaker
- Publication number 20020017423
- Publication date Feb 14, 2002
- PIONEER CORPORATION
- Toshifumi Kato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE