Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8309903 | Optical device, method for producing master for use in producing optical device, and photoelectric conversion apparatus | Sohmei Endoh, Kazuya Hayashibe, Tooru Nagai, Shirasagi Toshihiko, Kimitaka Nishimura +1 more | 2012-11-13 |
| 7633045 | Optical device, method for producing master for use in producing optical device, and photoelectric conversion apparatus | Sohmei Endoh, Kazuya Hayashibe, Tooru Nagai, Shirasagi Toshihiko, Kimitaka Nishimura +1 more | 2009-12-15 |
| 6975578 | Optical recording medium with grooves, optical recording medium master with grooves, apparatus for manufacturing optical recording medium master with grooves, and optical recording/reproducing apparatus | Sohmei Endoh, Katsuhiko Ohtomo | 2005-12-13 |
| 6909681 | Optical disk and optical disk apparatus | Masayoshi Nagata, Yasuo Tone | 2005-06-21 |