Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889666 | Method for producing concrete products provided with inlaid patterns | — | 1989-12-26 |
| 4847735 | Fitting structure of safety lamp to wheel | — | 1989-07-11 |
| 4800184 | Method for producing sulfur plates | Kunio Mizukami | 1989-01-24 |