Tokumo; Akio
Patent Applications and Registrations
Patent applications and USPTO patent grants for Tokumo; Akio.The latest application filed is for "power amplifier apparatus".
- Tokumo; Akio - Saitama JP
| Patent | Date |
|---|---|
| Power amplifier apparatus Grant 5,343,161 - Tokumo , et al. August 30, 1 | 1994-08-30 |
| Automatic level control circuit Grant 5,043,676 - Sato , et al. August 27, 1 | 1991-08-27 |
| Sound field correction system Grant 4,980,914 - Kunugi , et al. December 25, 1 | 1990-12-25 |
| Pulse width modulation amplifier circuit Grant 4,949,048 - Tokumo , et al. August 14, 1 | 1990-08-14 |
| Method and apparatus for measuring and correcting acoustic characteristic in sound field Grant 4,739,513 - Kunugi , et al. April 19, 1 | 1988-04-19 |
| Headrest-mounted acoustic device Grant 4,696,370 - Tokumo , et al. September 29, 1 | 1987-09-29 |
| Automatic sound field correcting system Grant 4,694,498 - Suzuki , et al. September 15, 1 | 1987-09-15 |
| Mobile sound field correcting device Grant 4,622,691 - Tokumo , et al. November 11, 1 | 1986-11-11 |
| Automatic sound volume control device Grant 4,476,571 - Tokumo , et al. October 9, 1 | 1984-10-09 |
| Differential amplifier Grant 4,456,887 - Tokumo June 26, 1 | 1984-06-26 |
| Oscillator having capacitor charged and discharged by current mirror circuits Grant 4,418,323 - Tokumo , et al. November 29, 1 | 1983-11-29 |
| Pulse width modulation amplifier Grant 4,415,863 - Tokumo November 15, 1 | 1983-11-15 |
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