Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10350676 | Spring steel with excellent fatigue resistance and method of manufacturing the same | Masafumi Miyazaki, Hideaki Yamamura, Takashi Fujita | 2019-07-16 |
| 10202665 | Spring steel and method for producing the same | Junya Yamamoto, Kazumi Mizukami, Naotsugu Yoshida, Masafumi Miyazaki, Kenichiro Miyamoto | 2019-02-12 |
| 10131973 | High strength spring steel and steel wire | Hiroshi Hagiwara, Takanori Miyaki, Takayuki Kisu, Kouichi Yamazaki | 2018-11-20 |
| 9896749 | Steel for induction hardening with excellent fatigue properties | Masafumi Miyazaki, Takashi Fujita, Hideaki Yamamura | 2018-02-20 |
| 9809875 | Case hardening steel with excellent fatigue properties | Masafumi Miyazaki, Takashi Fujita, Hideaki Yamamura | 2017-11-07 |
| 9777343 | Steel for surface hardening for machine structural use and part for machine structural use | Atsushi Mizuno, Kei Miyanishi, Shuji Kozawa | 2017-10-03 |
| 9732407 | Bearing steel and method for producing same | Masafumi Miyazaki, Hideaki Yamamura, Takahisa Suzuki, Takashi Fujita | 2017-08-15 |
| 9657379 | Forging steel | Hajime Saitoh, Tatsuro Ochi | 2017-05-23 |
| 9487848 | Hot forging use non-heat-treated steel and hot forged non-heat-treated steel part | Shinya Teramoto, Kei Miyanishi | 2016-11-08 |
| 9376738 | Hot forging use non-heat-treated steel and hot forged non-heat-treated steel part | Shinya Teramoto, Kei Miyanishi | 2016-06-28 |
| 9156231 | Steel for machine structure use for surface hardening and steel part for machine structure use | Atsushi Mizuno, Hajime Saitoh, Shuji Kozawa, Kei Miyanishi | 2015-10-13 |
| 9127336 | Hot-working steel excellent in machinability and impact value | Kei Miyanishi, Atsushi Mizuno | 2015-09-08 |
| 8980022 | Case hardening steel, carburized component, and manufacturing method of case hardening steel | Kei Miyanishi, Shuuji Kozawa, Manabu Kubota, Tatsuro Ochi | 2015-03-17 |
| 8876988 | Steel for nitriding and nitrided part | Tetsushi Chida, Manabu Kubota, Toshimi Tarui, Daisuke Hirakami | 2014-11-04 |
| 8845825 | High strength spring-use heat treated steel | Tatsuro Ochi, Takayuki Kisu, Hiroshi Hagiwara | 2014-09-30 |
| 8802005 | Steel for surface hardening for machine structural use and part for machine structural use | Atsushi Mizuno, Kei Miyanishi, Shuji Kozawa | 2014-08-12 |
| 8734600 | High strength steel wire for spring | Hitoshi Demachi, Takayuki Kisu, Shoichi Suzuki, Motonobu Suehiro, Jun Kawaguchi +2 more | 2014-05-27 |
| 8673094 | Case hardening steel and manufacturing method thereof | Kei Miyanishi, Shuji Kozawa, Manabu Kubota, Tatsuro Ochi | 2014-03-18 |
| 8137484 | Method of production of steel superior in machinability | Atsushi Mizuno, Kenichiro Naito, Hiroshi Hagiwara, Kohichi Isobe, Hiroshi Hirata | 2012-03-20 |
| 7789974 | High-strength spring steel wire | Hiroshi Hagiwara, Takanari Miyaki | 2010-09-07 |
| 7575646 | Heat-treated steel wire for high strength spring | Takanari Miyaki, Hiroshi Hagiwara, Hiroaki Hayashi, Shouich Suzuki, Katsuaki Shiiki +2 more | 2009-08-18 |
| 7488396 | Superior in machinability and method of production of same | Atsushi Mizuno, Kenichiro Naito, Hiroshi Hagiwara, Kohichi Isobe, Hiroshi Hirata | 2009-02-10 |
| 6858101 | Steel excellent in forgeability and machinability | Hiroshi Hirata, Kohichi Isobe, Ken Naito, Kenji Fukuyasu | 2005-02-22 |
| 6419761 | Steels for cold forging and process for producing the same | Hideo Kanisawa, Makoto Okonogi | 2002-07-16 |
| 6406565 | High toughness spring steel | Hiroshi Hagiwara, Takanari Miyaki, Toshio Banno | 2002-06-18 |