Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8074482 | Plug for cold drawing and method for manufacturing of metal pipe | Tatsuya Okui, Tadashi Kawakami | 2011-12-13 |
| 8070890 | Induction hardened hollow driving shaft | Kunio Kondo | 2011-12-06 |