Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10029946 | Cement composition additive containing polycarboxylic acid copolymer, zinc oxide particles and gluconate | Hyo Min Kim, Chang Bum Ko, Dong Jo Ryu | 2018-07-24 |
| 9650297 | Additive including cross-linked polycarboxylic copolymer and cement composition comprising the same | Chang Bum Ko, Young Min Kim | 2017-05-16 |
| 9126867 | Additive including polycarboxylic copolymer and cement composition comprising the same | Chang Bum Ko, Young Min Kim | 2015-09-08 |