Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4505253 | Water heater | Katsushi Mizutani, Masahiko Koumura | 1985-03-19 |
| 4278862 | Combination microwave and gas oven | Toshihiro Nozu, Yoshihiro Kanaya, Masahiko Koumura | 1981-07-14 |