Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7219933 | Hollow product, fluid processing system and joining method of hollow members | Tatsuya Sakamoto, Seiji Ishizu | 2007-05-22 |
| 6729354 | Double-pipe-structure hollow member, method of manufacturing double-pipe-structure hollow member, and fluid treating system employing double-pipe-structure hollow member | Seiji Ishizu, Yasuhiro Nobata, Akiyoshi Yamamoto, Suekichi Hangeishi, Mamoru Yashima | 2004-05-04 |