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Patent applications and USPTO patent grants for Miyaji; Naotaka.The latest application filed is for "microphone apparatus having a variable directivity pattern".
Patent | Date |
---|---|
Microphone apparatus having a variable directivity pattern Grant 4,696,043 - Iwahara , et al. September 22, 1 | 1987-09-22 |
Phased-array sound pickup apparatus Grant 4,559,642 - Miyaji , et al. December 17, 1 | 1985-12-17 |
Phased-array sound pickup apparatus having no unwanted response pattern Grant 4,521,908 - Miyaji , et al. June 4, 1 | 1985-06-04 |
Variable-directivity microphone device Grant 4,412,097 - Ishigaki , et al. October 25, 1 | 1983-10-25 |
Variable directional microphone system Grant 4,399,327 - Yamamoto , et al. August 16, 1 | 1983-08-16 |
Variable-directivity microphone device Grant 4,354,059 - Ishigaki , et al. October 12, 1 | 1982-10-12 |
Variable-directivity microphone device Grant 4,308,425 - Momose , et al. December 29, 1 | 1981-12-29 |
Open-back type headphone with a detachable attachment Grant 4,041,256 - Ohta , et al. August 9, 1 | 1977-08-09 |
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