Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5816087 | Method for producing a seamless steel tubular product | Tatsuro Katsumura, Yusuke Minami | 1998-10-06 |
| 5778714 | Method for manufacturing seamless pipe | Tatsuro Katsumura, Takashi Ariizumi, Motoharu Yamazaki | 1998-07-14 |