Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4968864 | Magnetic card control microwave oven | Keiichiro Doi, Minoru Makita | 1990-11-06 |
| 4339646 | Cooking operation announcement means of microwave oven | Keiichiro Doi, Minoru Makita | 1982-07-13 |