Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12377888 | Railway axle | Taizo Makino, Chihiro KOZUKA, Yuichiro Yamamoto, Toshiyuki Hata | 2025-08-05 |
| 9884355 | Manufacturing method of seamless metal pipe, mandrel mill, and auxiliary tool | — | 2018-02-06 |
| 9597718 | Manufacturing method and manufacturing apparatus of seamless metal pipe | — | 2017-03-21 |
| 9302302 | Mandrel mill and method for manufacturing seamless pipe or tube | — | 2016-04-05 |
| 9027377 | Rolling stand | — | 2015-05-12 |
| 8939004 | Method for adjusting rolling positions of rolling rolls constituting three-roll mandrel mill and method for manufacturing seamless pipes or tubes | Shigeru Kidani | 2015-01-27 |
| 8601844 | Multi-roll mandrel mill and method of producing seamless tubes | — | 2013-12-10 |
| 8584498 | Mandrel mill and method for manufacturing seamless pipe or tube | — | 2013-11-19 |
| 8490450 | Retract mandrel mill and method for rolling tube blank | — | 2013-07-23 |
| 8276424 | Grooved roll for a reducer and a reducer | — | 2012-10-02 |
| 8122749 | Mandrel mill and process for manufacturing a seamless pipe | — | 2012-02-28 |
| 7458426 | Steel pipe for embedding-expanding, and method of embedding-expanding oil well steel pipe | Yuji Arai, Kunio Kondo, Hisashi Amaya | 2008-12-02 |
| 7333925 | Manufacturing method and manufacturing apparatus of pipe, thickness deviation information derivation apparatus, and computer program | — | 2008-02-19 |
| 7225868 | Steel pipe for embedding-expanding, and method of embedding-expanding oil well steel pipe | Yuji Arai, Kunio Kondo, Hisashi Amaya | 2007-06-05 |
| 7174761 | Method of manufacturing a seamless pipe | Hiroyuki Iwamoto, Tooru Egoshi, Kenichi Sasaki | 2007-02-13 |
| 7093469 | Manufacturing method and manufacturing apparatus of pipe, thickness deviation information derivation apparatus, and computer program | — | 2006-08-22 |
| 7028518 | Method of producing seamless steel tubes | Kenichi Sasaki | 2006-04-18 |