Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6873975 | Content usage control system, content usage apparatus, computer readable recording medium with program recorded for computer to execute usage method | Takahisa Hatakeyama, Makoto Yoshioka | 2005-03-29 |
| 4703657 | Gas pressure sensor | Koichi Hirama, Haruhiko Kotake | 1987-11-03 |