Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9620323 | Vacuum tube | Kazunori Tatsuda, Tadami Maeda, Misa Yamanaka | 2017-04-11 |
| 9583300 | Vacuum tube | Kazunori Tatsuda, Tadami Maeda, Misa Yamanaka | 2017-02-28 |
| 7397303 | Vacuum tube circuit | — | 2008-07-08 |
| 7227962 | One-terminal effector | Yasuhiko Mori | 2007-06-05 |
| 7185549 | Pressure point detector | Haruhiko Motohashi | 2007-03-06 |
| 7053710 | Vacuum tube amplifier having grid as output and plate as input | — | 2006-05-30 |
| 6229387 | Output signal converter for ampliciation or attenuation of tube amplifier output while maintaining output properties | Yasuhiko Mori, Hirofumi Mitoma | 2001-05-08 |
| 6175271 | Output signal converter for tube amplifiers | Yasuhiko Mori, Hirofumi Mitoma | 2001-01-16 |
| 4276802 | Electronic keyboard instrument | — | 1981-07-07 |