Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12384151 | Head unit and liquid ejecting apparatus | Kenichi Oe, Kazuya TAJIMA | 2025-08-12 |
| 11905580 | Seamless steel pipe suitable for use in sour environment | Hiroki Kamitani, Nobuaki Komatsubara, Seiya OKADA, Yuji Arai, Shinji Yoshida | 2024-02-20 |
| 11898216 | Seamless steel pipe heat-treatment-finishing-treatment continuous facility | Hiroki Kamitani, Takanori Tanaka, Keiichi Kondo, Hideki MITSUNARI, Seiya OKADA +3 more | 2024-02-13 |
| 11891680 | Steel material suitable for use in sour environment | Yohei Otome, Hiroki Kamitani, Taro OE, Nobuaki Komatsubara, Yuji Arai +1 more | 2024-02-06 |
| 11773460 | Steel pipe and method for producing steel pipe | Yuji Arai, Shinji Yoshida, Hiroki Kamitani | 2023-10-03 |
| 11643712 | Steel pipe and method for producing steel pipe | Yuji Arai, Shinji Yoshida, Hiroki Kamitani | 2023-05-09 |
| 11434554 | Steel material suitable for use in sour environment | Hiroki Kamitani, Keiichi Kondo, Shinji Yoshida, Yuji Arai | 2022-09-06 |
| 11332813 | Steel material suitable for use in sour environment | Shinji Yoshida, Yuji Arai, Hiroki Kamitani | 2022-05-17 |
| 11313005 | Seamless steel pipe and method for producing the seamless steel pipe | Yuji Arai, Yosuke Tatebayashi, Keisuke Furo, Takenori Kuramoto, Hiroki Kamitani +1 more | 2022-04-26 |
| 11174539 | Steel material suitable for use in sour environment | Hiroki Kamitani, Shinji Yoshida, Yuji Arai, Seiya OKADA | 2021-11-16 |
| 11155893 | Steel material suitable for use in sour environment | Shinji Yoshida, Yuji Arai, Hiroki Kamitani | 2021-10-26 |
| 11078558 | Steel material, oil-well steel pipe, and method for producing steel material | Yuji Arai, Shinji Yoshida, Hiroki Kamitani | 2021-08-03 |
| 10233520 | Low-alloy steel pipe for an oil well | Yuji Arai | 2019-03-19 |
| 9777352 | Oil-well steel pipe having excellent sulfide stress cracking resistance | Tomohiko Omura, Yuji Arai, Mitsuhiro Numata, Toru Takayama, Masanao Seo | 2017-10-03 |
| 9175371 | Steel for steel tube with excellent sulfide stress cracking resistance | Mitsuhiro Numata, Tomohiko Omura, Masayuki Morimoto, Toru Takayama | 2015-11-03 |