Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845399 | Laminated piezoelectric transducer | Eturo Yasuda, Hiroshi Matsuoka, Yoichi Kotanshi, Yasushi Sawada | 1989-07-04 |
| 4810440 | Process for pre-expanding thermoplastic resin particles | Kyoichi Nakamura | 1989-03-07 |