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| No. | Title | Registration No. | Inventor | Issue Date |
|---|---|---|---|---|
| 28 | 10-1790444 | J. H. Jang et al. | 2017-10-19 | |
| 27 | 10-1784115 | J. H. Jang et al. | 2017-09-26 | |
| 26 | 10-1599198 | Y. S. Kim et al. | 2016-02-24 | |
| 25 | 10-1599197 | D. H. Lee et al. | 2016-02-24 | |
| 24 | 10-1594738 | P. U. Lee et al. | 2016-02-05 | |
| 23 | 10-1594737 | S. G. Park et al. | 2016-02-05 | |
| 22 | 10-1576007 | P. U. Lee et al. | 2015-12-02 | |
| 21 | 10-1565780 | J. O. Choi et al. | 2015-10-29 | |
| 20 | 10-1565785 | J. O. Choi et al. | 2015-10-29 | |
| 19 | 10-1552086 | D. H. Lee et al. | 2015-09-03 |