Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7867344 | Hot pressing method for high strength member using steel sheet and hot pressed parts | Kazuhisa Kusumi, Jun Maki, Masayuki Abe, Norihiro Fujita, Shinya Nakajima | 2011-01-11 |
| 7048811 | Electric resistance-welded steel pipe for hollow stabilizer | Tetsuya Magatani, Naoki Takasugi, Osamu Takeda | 2006-05-23 |
| 5772956 | High strength, ferritic heat-resistant steel having improved resistance to intermetallic compound precipitation-induced embrittlement | Yasushi Hasegawa, Hisashi Naoi | 1998-06-30 |
| 5650024 | Martensitic heat-resisting steel excellent in HAZ-softening resistance and process for producing the same | Yasushi Hasegawa, Nobuo Mizuhashi, Hisashi Naoi, Toshio Fujita | 1997-07-22 |
| 5268142 | High-nitrogen ferritic heat-resisting steel with high vanadium content and method of production thereof | Yasushi Hasegawa, Hisashi Naoi, Shuichi Funaki, Fujimitsu Masuyama | 1993-12-07 |
| 5254307 | High-nitrogen ferritic heat-resisting steel with high niobium content and method of production thereof | Yasushi Hasegawa, Hisashi Naoi, Fujimitsu Masuyama | 1993-10-19 |