Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10446737 | Piezoelectric element and method of manufacturing the same | Keiichi Hatano, Tomohiro Harada, Yutaka Doshida | 2019-10-15 |
| 10418542 | Piezoelectric ceramic speaker using vibration sheet formed with piezoelectric ceramic | Gouki Watanabe, Takayuki Goto, Keiichi Hatano, Yutaka Doshida | 2019-09-17 |