Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11778387 | Sound generator and method for manufacturing the same | — | 2023-10-03 |
| 11051110 | Sound generator | Koshiro HAYAKAWA | 2021-06-29 |
| D847114 | Speaker | — | 2019-04-30 |
| 10271120 | Sound generating device | Koshiro HAYAKAWA | 2019-04-23 |
| 10231042 | Speaker device | Kazuaki Watanabe, Junichi Sato, Makoto Tsuruta | 2019-03-12 |
| 9930442 | Sound production device for vehicle | Makoto Tsuruta | 2018-03-27 |
| 9868392 | Approaching vehicle warning speaker device | Kazuaki Watanabe, Junichi Sato, Makoto Tsuruta | 2018-01-16 |
| 9328935 | Housing structure | Makoto Tsuruta | 2016-05-03 |
| D711853 | Speaker | Makoto Tsuruta | 2014-08-26 |
| 8761426 | Housing structure for sound generator | Makoto Tsuruta | 2014-06-24 |
| 8615100 | Sound producing device for vehicle | Makoto Tsuruta, Masaru Tsuchiya | 2013-12-24 |
| 4935312 | Film carrier having tin and indium plated layers | Hiroshi Nakayama, Keijiro Suzuki | 1990-06-19 |