Issued Patents 2019
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10446737 | Piezoelectric element and method of manufacturing the same | Keiichi Hatano, Sumiaki Kishimoto, Tomohiro Harada | 2019-10-15 |
| 10433073 | Electroacoustic transducer | Shigeo Ishii, Hiroshi Hamada, Takashi Tomita | 2019-10-01 |
| 10418542 | Piezoelectric ceramic speaker using vibration sheet formed with piezoelectric ceramic | Gouki Watanabe, Takayuki Goto, Keiichi Hatano, Sumiaki Kishimoto | 2019-09-17 |
| 10412502 | Electroacoustic transducer with dual vibration plate | Shigeo Ishii, Takashi Tomita, Hiroshi Hamada | 2019-09-10 |
| 10250995 | Piezoelectric speaker and electroacoustic transducer | — | 2019-04-02 |