Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9689051 | Hollow seamless pipe for high-strength springs | Kotaro Toyotake | 2017-06-27 |
| 9650704 | Seamless steel pipe for hollow spring | Takuya Kochi, Eiichi Tamura, Kotaro Toyotake | 2017-05-16 |