Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11691227 | Solid wire for electroslag welding, and welding joint | Hidenori Nako, Keito ISHIZAKI, Yoshihiko Kitagawa | 2023-07-04 |
| 11577346 | Wire for electroslag welding, flux for electroslag welding and welded joint | Keito ISHIZAKI, Yimin YUAN, Hidenori Nako, Yoshitomi Okazaki | 2023-02-14 |
| 9725779 | Si-killed steel wire rod and spring | Koichi Sakamoto | 2017-08-08 |
| 9441695 | High cleanliness spring steel and high cleanliness spring excellent in fatigue properties | Sei Kimura, Koichi Sakamoto, Atsuhiko Yoshida, Takeshi Inoue | 2016-09-13 |
| 9394593 | Bearing steel material with excellent rolling contact fatigue properties and a bearing part | Masaki Kaizuka, Mutsuhisa Nagahama, Masaki Shimamoto | 2016-07-19 |
| 9359661 | Bearing steel material with excellent rolling fatigue property and bearing part | Masaki Shimamoto, Yosuke Shindo, Masaki Kaizuka, Akihiro OWAKI, Sei Kimura +1 more | 2016-06-07 |
| 9290822 | Si-killed steel wire rod and spring | Koichi Sakamoto | 2016-03-22 |
| 9062361 | Si-killed steel wire rod and spring excellent in fatigue properties | Koichi Sakamoto | 2015-06-23 |
| 8900381 | Spring steel and spring superior in fatigue properties | Koichi Sakamoto, Atsuhiko Yoshida, Kei MASUMOTO | 2014-12-02 |
| 8613809 | High cleanliness spring steel and high cleanliness spring excellent in fatigue properties | Sei Kimura, Koichi Sakamoto, Atsuhiko Yoshida, Takeshi Inoue | 2013-12-24 |
| 8187530 | Steel for high-cleanliness spring with excellent fatigue characteristics and high-cleanliness spring | Koichi Sakamoto, Yoshio Fukuzaki, Atsuhiko Yoshida, Takeshi Inoue | 2012-05-29 |
| 7666350 | Low carbon composite free-cutting steel product excellent in roughness of finished surface and method for production thereof | Hiroshi Yaguchi, Koichi Sakamoto, Goro Anan, Katsuhiko Ozaki | 2010-02-23 |
| 7615099 | Method for producing high cleanness steel excellent in fatigue strength or cold workability | Koichi Sakamoto, Atsuhiko Yoshida, Yoshio Fukuzaki, Sumie Suda | 2009-11-10 |
| 7608130 | Method for producing high cleanliness steel excellent in fatigue strength or cold workability | Koichi Sakamoto, Atsuhiko Yoshida, Yoshio Fukuzaki, Sumie Suda | 2009-10-27 |
| 7429301 | Ultra clean spring steel | Koichi Sakamoto, Atsuhiko Yoshida, Sumie Suda | 2008-09-30 |