Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9400027 | Coned disc spring | Norihiro Tajima | 2016-07-26 |
| 8297603 | Spring retainer and spring system | Noritoshi Takamura | 2012-10-30 |
| 8091873 | Coned disc spring | Yukitoshi Ogawa, Takayuki Ishikawa, Akihiko Kita, Shigeo Tsuzuki, Hiroyuki Nozaki | 2012-01-10 |
| 7997242 | Spring retainer and spring system | Noritoshi Takamura | 2011-08-16 |
| 7971690 | Coned disc spring | — | 2011-07-05 |
| 7438168 | Cushion plate | Akihiko Kita, Shigeo Tsuzuki, Hiroyuki Nozaki, Yukitoshi Ogawa, Takayuki Ishikawa | 2008-10-21 |