Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9947818 | Solar cell module | Naoki Tsujimoto | 2018-04-17 |
| 6913074 | Method of making an internal grooved tube | Koji Yamamoto, Tetsuya Sumitomo, Toshiaki Hashizume | 2005-07-05 |
| 6340050 | Internally grooved heat exchanger pipe and metal bar working roll for internally grooved heat exchanger pipes | Kouzi Yamamoto, Kenzi Nakamizo, Toshiaki Hashizume | 2002-01-22 |