Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7731239 | Card forming sheet | Masaaki Nishida, Takao Tsubouchi, Kenji Hirose | 2010-06-08 |
| 6635326 | Personal information protecting sheet | Yayoi Toyama, Kenji Hirose, Takao Tsubouchi | 2003-10-21 |