Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12338516 | Damper spring | Shinya Teramoto, Yutaka Neishi, Michimasa Aono, Shoichi Suzuki | 2025-06-24 |
| 12338518 | Valve spring | Shinya Teramoto, Yutaka Neishi, Michimasa Aono, Satoru Mineta, Shoichi Suzuki | 2025-06-24 |
| 12181012 | Damper spring | Shinya Teramoto, Yutaka Neishi, Michimasa Aono, Shuji Kozawa, Yoichi Oi +6 more | 2024-12-31 |
| 12006994 | Valve spring | Shinya Teramoto, Yutaka Neishi, Michimasa Aono, Shuji Kozawa, Fumio Takahashi +3 more | 2024-06-11 |
| 11952650 | Steel wire | Shinya Teramoto, Yutaka Neishi, Michimasa Aono, Shuji Kozawa, Satoru Mineta +1 more | 2024-04-09 |
| 9657379 | Forging steel | Hajime Saitoh, Masayuki Hashimura | 2017-05-23 |
| 8980022 | Case hardening steel, carburized component, and manufacturing method of case hardening steel | Kei Miyanishi, Masayuki Hashimura, Shuuji Kozawa, Manabu Kubota | 2015-03-17 |
| 8845825 | High strength spring-use heat treated steel | Masayuki Hashimura, Takayuki Kisu, Hiroshi Hagiwara | 2014-09-30 |
| 8673094 | Case hardening steel and manufacturing method thereof | Masayuki Hashimura, Kei Miyanishi, Shuji Kozawa, Manabu Kubota | 2014-03-18 |
| 8475605 | Surface layer-hardened steel part and method of manufacturing the same | Manabu Kubota | 2013-07-02 |
| 8328956 | Carbonitrided induction hardened steel part superior in surface fatigue strength at high temperature and method of production of same | Shuji Kozawa, Atsushi Mizuno | 2012-12-11 |
| 8034199 | Case-hardening steel excellent in cold forgeability and low carburization distortion property | Hajime Saitoh | 2011-10-11 |
| 7438771 | Steel material for high strength constant velocity joint intermediate shaft and high strength constant velocity joint intermediate shaft | Takashige Nagato, Koji Nishi, Yuji Inagaki, Kazuyuki Ichikawa, Isashi Kashiwagi +1 more | 2008-10-21 |
| 6866724 | Steel bar or wire rod for cold forging and method of producing the same | Hideo Kanisawa, Ken Naito | 2005-03-15 |
| 6660105 | Case hardened steel excellent in the prevention of coarsening of particles during carburizing thereof, method of manufacturing the same, and raw shaped material for carburized parts | Manabu Kubota | 2003-12-09 |
| 6602358 | Outer race for constant velocity joint, having improved anti-flaking properties and shaft strength, and process for producing the same | Hideo Kanisawa, Kenichiro Naito, Joji Tamura, Masayoshi Saga | 2003-08-05 |
| 6602359 | Bar or wire product for use in cold forging and method for producing the same | Hideo Kanisawa, Ken Naito | 2003-08-05 |
| 6551419 | Hot-rolled steel wire and rod for machine structural use and a method for producing the same | Hideo Kanisawa, Manabu Kubota, Koji Tanabe, Kiichiro Tsuchida | 2003-04-22 |
| 6547890 | Steel wire rod for cold forging and method for producing the same | Hideo Kanisawa, Manabu Kubota, Koji Tanabe, Kiichiro Tsuchida | 2003-04-15 |
| 6488787 | Cold workable steel bar or wire and process | Hideo Kanisawa, Manabu Kubota, Koji Adachi, Ryuichi Seki | 2002-12-03 |
| 6475306 | Hot rolled steel wire rod or bar for machine structural use and method for producing the same | Hideo Kanisawa, Manabu Kubota, Koji Tanabe, Kiichiro Tsuchida | 2002-11-05 |
| 6383311 | High strength drive shaft and process for producing the same | Hideo Kanisawa, Kenichiro Naito, Joji Tamura, Masayoshi Saga | 2002-05-07 |
| 6261388 | Cold forging steel having improved resistance to grain coarsening and delayed fracture and process for producing same | Manabu Kubota, Hideo Kanisawa, Atsushi Murakami, Masao Ishida | 2001-07-17 |
| 5725690 | Long-life induction-hardened bearing steel | Yuji Kawauchi | 1998-03-10 |
| 5705124 | High carbon bearing steel having a long life | Yuji Kawauchi | 1998-01-06 |