Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6215617 | Support member for magnetic disk substrate | Masahiro Okumura, Shinichi Yamaguchi | 2001-04-10 |
| 5969902 | Support magnetic disk substrate and magnetic disk unit using the support member composed of Forsterite and an iron based component | Masahiro Okumura, Shinichi Yamaguchi | 1999-10-19 |