Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5890457 | Boiler | Ryoichi Tanaka, Mamoru Matsuo, Hitoshi Yahara | 1999-04-06 |
| 5626104 | Boiler with increased flame temperature and output | Ryoichi Tanaka, Mamoru Matsuo, Hitoshi Yahara | 1997-05-06 |
| 5522348 | Boiler | Ryoichi Tanaka, Mamoru Matsuo, Hitoshi Yahara | 1996-06-04 |