Takashi Oyaba

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Speaker system having directivity
- Patent number 5,117,463
- Issue date May 26, 1992
- Pioneer Electronic Corporation
- Takashi Oyaba
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Speaker system having directivity
- Patent number 4,991,687
- Issue date Feb 12, 1991
- Pioneer Electronic Corporation
- Takashi Oyaba
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ribbon type speaker and method of assembling magnetic circuit thereof
- Patent number 4,461,932
- Issue date Jul 24, 1984
- Pioneer Electronic Corporation
- Takashi Oyaba
- H04 - ELECTRIC COMMUNICATION TECHNIQUE