Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4960221 | Pressure vessel | Eiichi Hiraoka | 1990-10-02 |
| 4955498 | Sealing structure of pressure container | Eiichi Hiraoka | 1990-09-11 |
| 4942972 | Pressure vessel | Eiichi Hiraoka, Toshio Akagi, Kiyotaka Yano | 1990-07-24 |