Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7006427 | Multi-layer optical recording medium and method of manufacturing the same | Kaoru Yamamoto, Keiji Suga, Tetsuya Iida | 2006-02-28 |
| 6881051 | Mold for injection molding of disc substrate | Keiji Suga, Tetsuya Imai | 2005-04-19 |
| 6770162 | Method of manufacturing a disk and transfer method for the disk | Keiji Suga | 2004-08-03 |
| 6656560 | Multi-layer optical recording medium and method of manufacturing the same | Kaoru Yamamoto, Keiji Suga, Tetsuya Iida | 2003-12-02 |
| 6478570 | Disc-manufacturing mold and disc manufacturing apparatus using the same | Keiji Suga, Tetsuya Imai, Tetsuya Iida | 2002-11-12 |
| 6464485 | Ultrasonic injection mold for an optical disk | Tetsuya Iida, Keiji Suga, Kenichi Ishiguro, Yasunobu Higashika, Atsushi Sato +1 more | 2002-10-15 |