Issued Patents All Time
Showing 1–25 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8302309 | Process for producing bearing device for wheel | Isao Hirai, Kohei Yoshino, Takayasu Takubo, Kazuhiko Yoshida, Kazukuni Hase +2 more | 2012-11-06 |
| 8118953 | Method for producing steel part having long rolling contact fatigue life | Takashi Iwamoto, Kunikazu Tomita, Hideto Kimura, Hisato Nishisaka, Masao Goto +1 more | 2012-02-21 |
| 7842141 | Stainless-steel pipe for oil well and process for producing the same | Mitsuo Kimura, Takanori Tamari | 2010-11-30 |
| 7827842 | Hot forging facility | Kazukuni Hase, Hideto Kimura | 2010-11-09 |
| 7806992 | Hot forged product with excellent fatigue strength, method for making the same, and machine structural part made from the same | Kazukuni Hase, Hideto Kimura | 2010-10-05 |
| 7678207 | Steel product for induction hardening, induction-hardened member using the same, and methods producing them | Yasuhiro Omori, Tohru Hayashi, Akihiro Matsuzaki | 2010-03-16 |
| 7591914 | High-workability steel pipe and method of producing same | Yoshikazu Kawabata, Akira Yorifuji, Masanori Nishimori, Motoaki Itadani, Takatoshi Okabe +1 more | 2009-09-22 |
| 7018488 | Steel pipe for use in reinforcement of automobile and method for production thereof | Masanori Nishimori, Yoshikazu Kawabata, Akira Yorifuji, Motoaki Itadani, Takatoshi Okabe +1 more | 2006-03-28 |
| 6949728 | Impeder for manufacturing welded pipe | Takatoshi Okabe, Motoaki Itadani, Masatoshi Aratani, Osamu Kondo | 2005-09-27 |
| 6846371 | Method for making high-strength high-toughness martensitic stainless steel seamless pipe | Yukio Miyata, Mitsuo Kimura | 2005-01-25 |
| 6755919 | Stainless steel tube for automobile structure | Akira Yorifuji, Makoto Kitazawa, Yoshikazu Kawabata, Motoaki Itadani, Masatoshi Aratani +1 more | 2004-06-29 |
| 6749954 | Welded steel pipe having excellent hydroformability and method for making the same | Masatoshi Aratani, Yoshikazu Kawabata, Yuji Hashimoto, Akira Yorifuji, Takatoshi Okabe +2 more | 2004-06-15 |
| 6736910 | High carbon steel pipe excellent in cold formability and high frequency hardenability and method for producing the same | Yoshikazu Kawabata, Akira Yorifuji, Masanori Nishimori, Motoaki Itadani, Takatoshi Okabe +2 more | 2004-05-18 |
| 6723453 | Welded steel pipe having excellent hydroformability and method for making the same | Masatoshi Aratani, Yoshikazu Kawabata, Yuji Hashimoto, Akira Yorifuji, Takatoshi Okabe +2 more | 2004-04-20 |
| 6682829 | Welded steel pipe having excellent hydroformability and method for making the same | Masatoshi Aratani, Yoshikazu Kawabata, Yuji Hashimoto, Akira Yorifuji, Takatoshi Okabe +2 more | 2004-01-27 |
| 6540848 | High strength, high toughness, seamless steel pipe for line pipe | Yukio Miyata, Mitsuo Kimura, Noritsugu Itakura | 2003-04-01 |
| 6505491 | Rolling mill and rolling-mill train | Shigeharu Ochi, Hiroshi Fujiwara, Sho Inui, Motoaki Itadani, Akira Yorifuji +4 more | 2003-01-14 |
| 6464802 | High Cr steel pipe for line pipe | Yukio Miyata, Mitsuo Kimura | 2002-10-15 |
| 6375059 | Method for smoothing steel pipe seam portion | Toshio Ohnishi, Masahiro Kagawa, Yoshnori Sugie, Koji Sugano, Nobuki Tanaka +6 more | 2002-04-23 |
| 6331216 | Steel pipe having high ductility and high strength and process for production thereof | Akira Yorifuji, Masanori Nishimori, Motoaki Itadani, Yuji Hashimoto, Takatoshi Okabe +6 more | 2001-12-18 |
| 6290789 | Ultrafine-grain steel pipe and process for manufacturing the same | Akira Yorifuji, Masanori Nishimori, Motoaki Itadani, Yuji Hashimoto, Takatoshi Okabe +6 more | 2001-09-18 |
| 6216520 | Rolling mill | Shigeharu Ochi, Hiroshi Fujiwara, Sho Inui, Motoaki Itadani, Akira Yorifuji +4 more | 2001-04-17 |
| 6216511 | Apparatus and method for smoothing a welded seam of steel pipe | Toshio Ohnishi, Masahiro Kagawa, Yoshnori Sugie, Koji Sugano, Nobuki Tanaka +6 more | 2001-04-17 |
| 6216940 | Pipe forming roll apparatus and method | Koji Sugano, Masahiro Kagawa, Toshio Ohnishi, Kingo Sawada, Yoshinori Sugie +5 more | 2001-04-17 |
| 6202463 | Plug and mandrel bar for seamless steel pipe rolling operation for manufacturing seamless steel pipe | Akira Yorifuji, Taro Kanayama | 2001-03-20 |