Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4567472 | Security-ensuring apparatus having an operational guidance function | Shiro Shirai, Shunji Ogahara | 1986-01-28 |
| 4536749 | Security-ensuring apparatus having an operational guidance function | Shiro Shirai, Shunji Ogahara | 1985-08-20 |