Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7218384 | Surveying system | Masami Shirai, Koji Tsuda, Atsumi Kaneko, Ryota Ogawa | 2007-05-15 |
| 7098997 | Surveying system | Masami Shirai, Koji Tsuda, Atsumi Kaneko, Ryota Ogawa, Takeshi Mimura +2 more | 2006-08-29 |
| 7075634 | Surveying system | Masami Shirai, Koji Tsuda, Atsumi Kaneko, Ryota Ogawa | 2006-07-11 |