Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877497 | Acidic electro-galvanizing solution | Akihiko Furuta | 1989-10-31 |
| 4863646 | Method of producing fine particles of thermoplastic resin | Hideki Hayashi | 1989-09-05 |
| 4861036 | Multi-level crossing maze toy | — | 1989-08-29 |