Issued Patents 2005
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6913074 | Method of making an internal grooved tube | Koji Yamamoto, Tetsuya Sumitomo, Toshiaki Hashizume | 2005-07-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6913074 | Method of making an internal grooved tube | Koji Yamamoto, Tetsuya Sumitomo, Toshiaki Hashizume | 2005-07-05 |