Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840104 | Keyboard | Muneo Ishida, Mithuo Yamashita, Masanari Onishi | 1989-06-20 |
| 4837938 | Scale balancing device in drawing machine | — | 1989-06-13 |
| 4818451 | Method of preparing a foamed molded article and blow-filling gun apparatus for use therein | Masakazu Arai | 1989-04-04 |