| Feb. 2010 |
Obtains a patent for “Double Shock Absorbing Castors ” under PAT No.4458960 |
|---|---|
| Sep. 2010 |
Obtains a patent for “Shock Absorbing Castors V -Torsion spring type-” under PAT No.4579285 |
| Dec. 2010 |
Obtains a patent for “Shock Absorbing Castors I-B -Advanced coil spring type-” under PAT No.4651658 |
| Sep. 2015 |
Obtains a patent for “Safety lock castor” under PAT No.5800651 |
| Dec. 2016 |
Obtains a patent for “The device that can adjust seat inclination angle and the wheelchair to which this device is mounter” under PAT No.6052693 |