Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7093861 | Exhaust pipe joint structure and coil spring used in the same | Takashi Yanagihara, Suekichi Hangeishi | 2006-08-22 |
| 6790294 | Spring with excellent fatigue endurance property and surface treatment method for producing the spring | Masaaki Ishida, Kazuhiro Uzumaki, Yuji Isono, Keiichiro Teratoko, Yoshiro Yamada +1 more | 2004-09-14 |