Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857188 | Iron powder attracting magnet | Junzo Aisa | 1989-08-15 |
| 4810148 | Drain bolt | Junzo Aisa | 1989-03-07 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857188 | Iron powder attracting magnet | Junzo Aisa | 1989-08-15 |
| 4810148 | Drain bolt | Junzo Aisa | 1989-03-07 |