Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8437243 | Optical information recording medium | Hideharu Tajima, Atsushi Etoh, Ryo KOJIMA, Masahito Konishi, Isamu Kuribayashi | 2013-05-07 |
| 7933189 | Focus optical system and optical disc master exposure apparatus | Takeshi Omori, Takaaki Kassai, Kenji Maebara, Keiji Fujita | 2011-04-26 |