Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11964321 | Coiling machine, method for manufacturing coil spring, and coil spring | Daiki HAGIWARA, Takuya Sato, Yuichiro Yamauchi | 2024-04-23 |
| 11821485 | Coil spring | Shinichi Nishizawa, Senri Moriyama | 2023-11-21 |
| 11371575 | Coil spring | Shinichi Nishizawa, Senri Moriyama, Fang Dai | 2022-06-28 |
| 10556265 | Coiling machine and manufacturing method of coil spring | Yusuke KUMAGAWA | 2020-02-11 |
| 8460483 | Method for heat treatment of coiled spring | Takashi Yajima, Hideki Okada, Katsuyuki Nishioka | 2013-06-11 |
| 6928846 | Method of manufacturing a coil spring having an oblique and straight axial line | — | 2005-08-16 |