Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9759647 | Wear-proof tester for retainer in needle cage | Shoji Nagao | 2017-09-12 |
| 8562223 | Full complement roller bearing packed with gel-like lubricant | Kengo Hidano, Shoji Nagao, Shigmasa Itabashi | 2013-10-22 |