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Patents
| Title of Invention | Patent/Practical Model Registration Number | Registration Date |
|---|---|---|
| Automatic driving support systems | Patent No. 6754925 | 2020/08/27 |
| Road tunnel ventilation controller | Patent No. 6754517 | 2020/08/26 |
| Fast fire detection system and fast fire detection method | Patent No. 6598385 | 2019/10/11 |
| Power supply system for driving jet fans using non-isolation transformer | Patent No. 6555594 | 2019/07/19 |
| Power supply system for driving tunnel fans using improved non-isolation transformer | Patent No. 6516170 | 2019/04/26 |
| Tunnel ventilation control system using jet fans for two-way traffic tunnels | Patent No. 6089329 | 2017/02/17 |
| Traffic detection system | Patent No. 6007395 | 2016/09/23 |
| Road tunnel ventilation controller | Patent No. 5558063 | 2014/06/13 |
| Ventilation control system for long-distance road tunnels | Patent No. 5335550 | 2013/08/09 |
| Variable speed induction motor drive for road tunnel jet fans driven via long cable | Patent No. 5300775 | 2013/06/28 |
| Tunnel ventilation control system using jet fans for two-way traffic tunnels | Patent No. 4898732 | 2012/01/06 |
| Image processor | Patent No. 4718250 | 2011/04/08 |
| Volume data rendering system and volume data rendering processing program | Patent No. 4656633 | 2011/01/07 |
| Air conditioning control system using natural ventilation by normal air | Patent No. 4187688 | 2008/09/19 |
| Dynamic simulator for road tunnel ventilation control and its program | Patent No. 4164556 | 2008/08/08 |
| Information acquisition device for vehicle passing on road | Utility model No. 3094435 | 2003/03/19 |
| Road tunnel fire information provision system | Utility model No. 3091131 | 2002/10/23 |
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