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Patent applications and USPTO patent grants for Oyaba; Takashi.The latest application filed is for "speaker system having directivity".
Patent | Date |
---|---|
Speaker system having directivity Grant 5,117,463 - Oyaba , et al. May 26, 1 | 1992-05-26 |
Speaker system having directivity Grant 4,991,687 - Oyaba , et al. February 12, 1 | 1991-02-12 |
Piezoelectric diaphragm electro-acoustic transducer Grant 3,982,143 - Tamura , et al. September 21, 1 | 1976-09-21 |
Piezoelectric electro-acoustic diaphragm transducer with composite resilient backing Grant 3,976,897 - Tamura , et al. August 24, 1 | 1976-08-24 |
Multiple Cartridge Tape Recorder/reproducer Head Shifting Assembly Grant 3,809,827 - Oyaba May 7, 1 | 1974-05-07 |
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