Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5735156 | Method and apparatus for forming a non-circular pipe | Yuji Yoshitomi, Shinji Tanaka, Takeshi Araya, Takamitsu Nakazaki, Norio Yokoba +1 more | 1998-04-07 |
| 4730474 | Method of relieving residual stress in metal pipe | Yuuji Yoshitomi, Takashi Naganawa, Toshio Saitoh, Tatsuo Seki | 1988-03-15 |