Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882079 | Piezoelectric ceramic materials | Masahiro Tomita | 1989-11-21 |
| 4845399 | Laminated piezoelectric transducer | Hiroshi Matsuoka, Hiroyuki Yoshida, Yoichi Kotanshi, Yasushi Sawada | 1989-07-04 |