Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10385430 | High-strength steel material having excellent fatigue properties | Hiroshi Oura, Tomokazu Masuda, Takayuki Naito, Akito Suzuki | 2019-08-20 |
| 9994940 | High carbon steel wire rod having excellent drawability | Hiroshi Oura | 2018-06-12 |
| 9970072 | High-strength spring steel wire with excellent hydrogen embrittlement resistance, manufacturing process therefor, and high-strength spring | Atsuhiko Takeda | 2018-05-15 |
| 9611523 | Cold formable spring steel wire excellent in cold cutting capability and fatigue properties and manufacturing process thereof | — | 2017-04-04 |
| 9540718 | High-strength steel wire material exhibiting excellent cold-drawing properties, and high-strength steel wire | Tomonobu Ishida | 2017-01-10 |
| 9121080 | High-carbon steel wire excellent in wire drawability and fatigue property after wiredrawing | Hiroshi Oura | 2015-09-01 |
| 9097306 | Steel wire rod for high-strength spring excellent in wire drawability, manufacturing method therefor, and high-strength spring | Tomonobu Ishida, Shuhei Kitamura | 2015-08-04 |
| 8557061 | Spring steel with excellent resistance to hydrogen embrittlement and steel wire and spring obtained from the steel | — | 2013-10-15 |
| 8382918 | Steel wire material for spring and its producing method | Fujio Koizumi, Hirokazu Inoue, Katsuya Takaoka, Shoji Miyazaki, Sayaka Nagamatsu | 2013-02-26 |
| 8192562 | Spring steel wire excellent in fatigue characteristic and wire drawability | — | 2012-06-05 |
| 8043444 | Steel wire for cold-formed spring excellent in corrosion resistance and method for producing the same | — | 2011-10-25 |
| 7901520 | Spring wire rod excelling in fatigue characteristics | — | 2011-03-08 |
| 7887924 | High-strength steel with excellent unsusceptibility to hydrogen embrittlement | Wataru Urushihara, Toshiki Sato | 2011-02-15 |
| 7763123 | Spring produced by a process comprising coiling a hard drawn steel wire excellent in fatigue strength and resistance to setting | Sumie Suda, Nobuhiko Ibaraki, Shigetsugu Yoshida, Koji Harada | 2010-07-27 |
| 7618498 | Steels for high-strength springs excellent in cold workability and quality stability | Takuya Kochi, Hiroshi Yaguchi | 2009-11-17 |
| 7597768 | Steel wire for hard drawn spring excellent in fatigue strength and resistance to settling, and hard drawn spring and method of making thereof | Sumie Suda, Nobuhiko Ibaraki, Shigetsugu Yoshida, Koji Harada | 2009-10-06 |
| 6372056 | Spring steel superior in workability | Takeshi Kuroda, Nobuhiko Ibaraki | 2002-04-16 |
| 6206984 | Non-heat treated wire or bar steel for springs | Atsushi INADA, Nobuhiko Ibaraki | 2001-03-27 |