Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10121956 | Electroacoustic transducer | Takashi Tomita, Shigeo Ishii, Hiroshi Hamada | 2018-11-06 |
| 9973857 | Piezoelectric speaker and electroacoustic transducer | Yasukazu Tokuhisa, Takashi Tomita, Hiroshi Hamada, Shigeo Ishii, Yoshiyuki Watanabe | 2018-05-15 |