Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9783017 | Suspension coil spring | Yukihiro Sugimoto, Masahiko Shimizu | 2017-10-10 |
| 8764877 | Method for producing high-purity tungsten powder | Jin Sato, Kouichi Takemoto, Takeshi Sasaki, Mikio Ohno | 2014-07-01 |
| 7841088 | Method of producing a suspension coil spring | Yukihiro Sugimoto, Masahiko Shimizu | 2010-11-30 |
| 6726191 | Spring sheet | Koichi Miyagawa, Takashi Fujii, Nobuo Momose, Masahiko Shimizu | 2004-04-27 |