Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6478835 | Abrasive composition for polishing magnetic recording disk substrates | Kiyoshi Tada, Kenji Tomita | 2002-11-12 |
| 6478837 | Abrasive composition substrate for magnetic recording disks and process for producing substrates for magnetic recording disk | — | 2002-11-12 |