Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6346157 | Manufacturing method of suspension spring for car | Kazuo Ichiki, Naoki Tadakuma, Takahiro Tanae, Hiroshi Akiyama | 2002-02-12 |
| 5685525 | Carbon fiber reinforced resin coil spring | Takeshi Oguri, Masanobu Wakita, Masahito Yamauchi, Toshio Hisano, Masahiro Arai | 1997-11-11 |