Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6501728 | Optical disc having groove and land tracks | Takeshi Koizumi, Hiroyuki Sakai | 2002-12-31 |
| 6268043 | Magnetic recording medium | Takeshi Koizumi, Miwako Sato | 2001-07-31 |
| 5997987 | Magnetic recording medium | Takeshi Koizumi, Miwako Sato | 1999-12-07 |
| 5297585 | Room temperature shrinkable tube | Hiroyuki Andou, Osamu Miyata | 1994-03-29 |