Issued Patents All Time
Showing 26–40 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6136109 | Method of manufacturing high chromium martensite steel pipe having excellent pitting resistance | Yukio Miyata, Mitsuo Kimura, Tomoya Koseki, Fumio Murase | 2000-10-24 |
| 6095957 | Roll for hot rolling having enhanced abrasion resistance and reduced carbide segregation | Kenji Ichino, Tomoya Koseki, Kohji Yuda | 2000-08-01 |
| 6041632 | Pipe forming roll apparatus and method | Koji Sugano, Masahiro Kagawa, Toshio Ohnishi, Kingo Sawada, Yoshinori Sugie +5 more | 2000-03-28 |
| 6006789 | Method of preparing a steel pipe, an apparatus thereof and a steel pipe | Akira Yorifuji, Motoaki Itadani, Toshio Ohnishi, Yuji Hashimoto, Nobuki Tanaka +1 more | 1999-12-28 |
| 5985209 | Martensitic steel for line pipe having excellent corrosion resistance and weldability | Mitsuo Kimura, Yukio Miyata, Tomoya Koseki, Fumio Murase | 1999-11-16 |
| 5983689 | Lubricant for use in hot work | Akira Yorifuji, Ken Shimamoto, Masaharu Kita, Taro Kanayama | 1999-11-16 |
| 5942132 | Method of and apparatus for producing steel pipes | Motoaki Itadani, Akira Yorifuji, Yuji Hashimoto, Toshio Ohnishi, Nobuki Tanaka +3 more | 1999-08-24 |
| 5859124 | Lubricant for use in hot work | Akira Yorifuji, Ken Shimamoto, Masaharu Kita, Taro Kanayama | 1999-01-12 |
| 5858128 | High chromium martensitic steel pipe having excellent pitting resistance and method of manufacturing | Yukio Miyata, Mitsuo Kimura, Tomoya Koseki, Fumio Murase | 1999-01-12 |
| 5784911 | Apparatus for manufacturing a welded pipe | Yuji Hashimoto, Motoaki Itatani, Susumu Itatani, Tsutomu Ide | 1998-07-28 |
| 5673579 | Welded steel pipe manufacturing apparatus and method | Yuuji Hashimoto, Motoaki Itadani, Susumu Itadani, Tsutomu Ide | 1997-10-07 |
| 5599264 | Roller width adjusting device for a divided type molding roller | Yuji Hashimoto, Susumu Itatani, Tsutomu Ide | 1997-02-04 |
| 5301869 | Machine for manufacturing welded steel pipes and method for handling the machine | Yuuji Hashimoto, Susumu Itadani, Tsutomu Ide | 1994-04-12 |
| 4590781 | Method for forming an electric resistance welded steel pipe | — | 1986-05-27 |
| 4568015 | Method of forming electric welded steel tube | Eiichi Yokoyama, Akio Ejima, Yoshitomi Onoda | 1986-02-04 |