Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8031869 | Information recording medium, usage management method, and usage management apparatus | Masaru Yamaoka, Takahiro Nagai, Hideshi Ishihara | 2011-10-04 |
| 8027237 | Optical storage medium, information recording apparatus, and information reproducing apparatus | Shin-ichi Kadowaki, Masaru Yamaoka, Toyoji Gushima, Makoto Usui, Shin-ichi Tanaka +1 more | 2011-09-27 |