Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9238258 | Method for producing double-wall tube with braided wires at its interface | Takuya HANADA, Takashi Nakashima, Tetsuo Yokoyama, Kouichi Kuroda | 2016-01-19 |
| 8166789 | Pipe or tube reducing mill and roll for reducing mill | Koichi Kuroda | 2012-05-01 |
| 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 |
| 7788957 | Apparatus for pipe end sizing and method for pipe end sizing | Kouichi Kuroda, Masayoshi Akiyama | 2010-09-07 |
| 7765850 | Mechanical pipe-end expander and a method of manufacturing seamless steel pipe | Tsutomu Arita, Masayoshi Akiyama, Kouichi Kuroda | 2010-08-03 |
| 7401486 | Die, method of manufacturing stepped metal pipe or tube, and stepped metal pipe or tube | Koichi Kuroda, Masayoshi Akiyama | 2008-07-22 |