Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9404547 | Steel for high-strength spring, method for producing same, and high-strength spring | Hideki Okada, Akira Tange, Koichi Tango | 2016-08-02 |
| 8533954 | Method for manufacturing a coil spring for vehicle suspension | Akira Tange, Hideki Okada, Mitsuhiro Sugiyama | 2013-09-17 |
| 8308150 | Coil spring for vehicle suspension and method for manufacturing the same | Akira Tange, Hideki Okada, Mitsuhiro Sugiyama | 2012-11-13 |
| 8297092 | Reflection member for shot peening and shot peening method having the same | Akira Tange, Masato Sugawara, Ken Takahashi, Yutaka Wakabayashi, Masayoshi Kawai | 2012-10-30 |