Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8079243 | Plug, method of expanding inside diameter of metal pipe or tube using such plug, method of manufacturing metal pipe or tube, and metal pipe or tube | Koichi Kuroda, Masayoshi Akiyama | 2011-12-20 |
| 8074482 | Plug for cold drawing and method for manufacturing of metal pipe | Kouichi Kuroda, Tadashi Kawakami | 2011-12-13 |