Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9873183 | Manufacturing method of rotary grindstone and rotary grindstone which has been manufactured by the manufacturing method | Gakusho Ri | 2018-01-23 |
| 8142263 | Method of manufacturing revolving whetstone and revolving whetstone manufactured by the same | Xue Sheng Li, Takayuki Matsubara | 2012-03-27 |
| D277486 | Grinding wheel | — | 1985-02-05 |