Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4393373 | Piezoelectric audible sound generator | Michihiro Torii, Hiroshi Urata, Shinichi Suzuki | 1983-07-12 |
| 4368402 | H-Type ceramic resonator | Michihiro Torii, Ryoji Tsuchiya, Hiroshi Urata, Isamu Sasaki, Kunio Esaki | 1983-01-11 |