Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6866725 | Steel pipe excellent in formability and method of producing the same | Nobuhiro Fujita, Naoki Yoshinaga, Manabu Takahashi, Yasuhiro Shinohara, Yasushi Hasegawa | 2005-03-15 |
| 6782921 | High-strength steel pipe excellent in formability and burst resistance | Eiji Tsuru, Takuya Hara, Hideki Miyazaki, Tatsuya Yoshida | 2004-08-31 |
| 6532995 | Super-high-strength line pipe excellent in low temperature toughness and production method thereof | Hiroshi Tamehiro, Takuya Hara, Yoshio Terada, Shigeru Ohkita, Kunio Koyama | 2003-03-18 |
| 6517643 | Steel having excellent outer surface SCC resistance for pipeline | Shigeo Okano, Takahiro Kushida, Yasuyoshi Yamane, Hideaki Fukai | 2003-02-11 |
| 6264760 | Ultra-high strength, weldable steels with excellent ultra-low temperature toughness | Hiroshi Tamehiro, Takuya Hara, Yoshio Terada, Michael J. Luton, Jayoung Koo +2 more | 2001-07-24 |
| 6248191 | Method for producing ultra-high strength, weldable steels with superior toughness | Michael J. Luton, Jayoung Koo, Narasimha-Rao Venkata Bangaru, Clifford W. Petersen, Hiroshi Tamehiro +2 more | 2001-06-19 |
| 6248187 | Corrosion resisting steel and corrosion resisting oil well pipe having high corrosion resistance to carbon dioxide gas | Koichi Nose | 2001-06-19 |
| 6228183 | Ultra-high strength, weldable, boron-containing steels with superior toughness | Narasimha-Rao Venkata Bangaru, Jayoung Koo, Michael J. Luton, Clifford W. Petersen, Hiroshi Tamehiro +2 more | 2001-05-08 |
| 6224689 | Ultra-high strength, weldable, essentially boron-free steels with superior toughness | Jayoung Koo, Michael J. Luton, Narasimha-Rao Venkata Bangaru, Clifford W. Petersen, Hiroshi Tamehiro +2 more | 2001-05-01 |
| 5985053 | Steel having improved toughness in welding heat-affected zone | Takuya Hara, Hiroshi Tamehiro, Ryuji Uemori, Naoki Saito | 1999-11-16 |
| 5820699 | Martensitic stainless steel having excellent hot workability and sulfide stress cracking resistance | Takuya Hara, Akira Kawakami | 1998-10-13 |
| 5798004 | Weldable high strength steel having excellent low temperature toughness | Hiroshi Tamehiro, Takuya Hara, Yoshio Terada | 1998-08-25 |
| 5755895 | High strength line pipe steel having low yield ratio and excellent in low temperature toughness | Hiroshi Tamehiro, Takuya Hara, Yoshio Terada | 1998-05-26 |