Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12173835 | Electric resistance welded steel pipe, method for manufacturing the same, and automotive structural member | Ryo Nakazawa, Hiroyuki Shirosawa | 2024-12-24 |
| 12139780 | Hot-rolled steel sheet for electric resistance welded steel pipe and method for manufacturing the same, electric resistance welded steel pipe and method for manufacturing the same, line pipe, and building structure | Akihide Matsumoto, Atsushi Matsumoto, Takatoshi Okabe | 2024-11-12 |
| 11945020 | Metal pipe and method for manufacturing metal pipe | Akihide Matsumoto, Atsushi Matsumoto, Takatoshi Okabe | 2024-04-02 |
| 11484927 | Clad welded pipe or tube and method of producing same | Takatoshi Okabe, Atsushi Matsumoto, Akihide Matsumoto | 2022-11-01 |
| 11079045 | Electric resistance welded clad steel pipe or tube and method of producing same | Akihide Matsumoto, Atsushi Matsumoto, Takatoshi Okabe | 2021-08-03 |
| 10844993 | Electric-resistance-welded stainless clad steel pipe or tube | Atsushi Matsumoto, Yuji Hashimoto, Takatoshi Okabe | 2020-11-24 |
| 10724670 | Method of producing electric-resistance-welded stainless clad steel pipe or tube | Atsushi Matsumoto, Yuji Hashimoto, Takatoshi Okabe | 2020-07-28 |
| 10421145 | Method for producing circumferential weld joint for low-carbon martensitic stainless steel pipes | Takeshi Suzuki, Yukio Miyata, Hiroki Ota | 2019-09-24 |
| 9871258 | Stainless steel for fuel cell separators | Masayasu Nagoshi, Shin Ishikawa, Noriko Makiishi | 2018-01-16 |
| 9653738 | Method for producing stainless steel for fuel cell separator, stainless steel for fuel cell separator, fuel cell separator, and fuel cell | Tomohiro Ishii, Shin Ishikawa, Yasushi Kato | 2017-05-16 |
| 9531014 | Stainless steel for fuel cell separators | Masayasu Nagoshi, Shin Ishikawa, Noriko Makiishi | 2016-12-27 |
| 9130199 | Stainless steel for fuel cell having good corrosion resistance and method for producing the same | Tomohiro Ishii, Naoki Nishiyama, Shin Ishikawa, Takumi Ujiro, Noriko Makiishi | 2015-09-08 |
| 8440029 | Stainless steel having good conductivity and ductility for use in fuel cell and method for producing the same | Atsutaka Honda, Shin Ishikawa, Takumi Ujiro | 2013-05-14 |