Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6668587 | Method for the production of glass substrates for magnetic recording mediums | Daisaku Kobayashi | 2003-12-30 |
| 6530825 | Method for the production of glass substrates for magnetic recording mediums | Toshio Hosaka, Junji Masunaga | 2003-03-11 |