Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6805620 | Grindstone having resinoid abrasive structure including abrasive agglomerates each provided by vitrified abrasive structure | Kouji Iwai, Yasushi Sato | 2004-10-19 |
| 6562089 | Hybrid type resinoid grindstone with abrasive agglomerates in which sol-gel abrasive grains are held by vitrified bond | Kouji Iwai | 2003-05-13 |
| 6402606 | Grinding wheel having urethane resin bushing in its center mounting hole | Ryuichi Nakane | 2002-06-11 |