Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11177814 | Delay locked loop circuit and semiconductor memory device having the same | Hwapyong Kim | 2021-11-16 |
| 11145355 | Calibration circuit for controlling resistance of output driver circuit, memory device including the same, and operating method of the memory device | Hwapyong Kim, Junha Lee | 2021-10-12 |