Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8025039 | Valve spring device and valve train of internal combustion engine using the same | Kazuo Iwata, Jun Tominaga, Norihiro Tajima, Takeshi Yabushita | 2011-09-27 |
| 8007716 | Steel wire for high strength spring excellent in workability and high strength | Sumie Suda, Nobuhiko Ibaraki, Naoki Terakado, Satoru Tendo, Tadayoshi Fujiwara +1 more | 2011-08-30 |
| 7997242 | Spring retainer and spring system | Hironobu Imaizumi | 2011-08-16 |