Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7591914 | High-workability steel pipe and method of producing same | Takaaki Toyooka, Yoshikazu Kawabata, 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 | Takaaki Toyooka, Masanori Nishimori, Yoshikazu Kawabata, Motoaki Itadani, Takatoshi Okabe +1 more | 2006-03-28 |
| 6755919 | Stainless steel tube for automobile structure | Takaaki Toyooka, 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 | Takaaki Toyooka, Masatoshi Aratani, Yoshikazu Kawabata, Yuji Hashimoto, 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 | Takaaki Toyooka, Yoshikazu Kawabata, Masanori Nishimori, Motoaki Itadani, Takatoshi Okabe +2 more | 2004-05-18 |
| 6723453 | Welded steel pipe having excellent hydroformability and method for making the same | Takaaki Toyooka, Masatoshi Aratani, Yoshikazu Kawabata, Yuji Hashimoto, Takatoshi Okabe +2 more | 2004-04-20 |
| 6682829 | Welded steel pipe having excellent hydroformability and method for making the same | Takaaki Toyooka, Masatoshi Aratani, Yoshikazu Kawabata, Yuji Hashimoto, Takatoshi Okabe +2 more | 2004-01-27 |
| 6505491 | Rolling mill and rolling-mill train | Shigeharu Ochi, Hiroshi Fujiwara, Sho Inui, Takaaki Toyooka, Motoaki Itadani +4 more | 2003-01-14 |
| 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 | Takaaki Toyooka, Masanori Nishimori, Motoaki Itadani, Yuji Hashimoto, Takatoshi Okabe +6 more | 2001-12-18 |
| 6290789 | Ultrafine-grain steel pipe and process for manufacturing the same | Takaaki Toyooka, Masanori Nishimori, Motoaki Itadani, Yuji Hashimoto, Takatoshi Okabe +6 more | 2001-09-18 |
| 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 |
| 6216520 | Rolling mill | Shigeharu Ochi, Hiroshi Fujiwara, Sho Inui, Takaaki Toyooka, Motoaki Itadani +4 more | 2001-04-17 |
| 6202463 | Plug and mandrel bar for seamless steel pipe rolling operation for manufacturing seamless steel pipe | Takaaki Toyooka, Taro Kanayama | 2001-03-20 |
| 6006789 | Method of preparing a steel pipe, an apparatus thereof and a steel pipe | Takaaki Toyooka, Motoaki Itadani, Toshio Ohnishi, Yuji Hashimoto, Nobuki Tanaka +1 more | 1999-12-28 |
| 5983689 | Lubricant for use in hot work | Takaaki Toyooka, Ken Shimamoto, Masaharu Kita, Taro Kanayama | 1999-11-16 |
| 5950310 | Forged roll for rolling a seamless steel pipe and manufacturing method of same | Taro Kanayama, Toshiaki Kasuya, Yuichiro Sato, Shoitsu Seo, Satoshi Matsuoka | 1999-09-14 |
| 5942132 | Method of and apparatus for producing steel pipes | Takaaki Toyooka, Motoaki Itadani, Yuji Hashimoto, Toshio Ohnishi, Nobuki Tanaka +3 more | 1999-08-24 |
| 5859124 | Lubricant for use in hot work | Takaaki Toyooka, Ken Shimamoto, Masaharu Kita, Taro Kanayama | 1999-01-12 |
| 5813962 | Forged roll for rolling a seamless steel pipe | Taro Kanayama, Toshiaki Kasuya, Yuichiro Sato, Shoitsu Seo, Satoshi Matsuoka | 1998-09-29 |