Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5736447 | Method for manufacturing a bipolar junction transistor having a polysilicon emitter | Jung-Dal Choi, Dong-Soo Chang | 1998-04-07 |
| 5716885 | Method for manufacturing NAND type mask-ROM having improved cell current | Jung-Dal Choi | 1998-02-10 |
| 5714038 | Method for forming contact hole of semiconductor device | — | 1998-02-03 |
| 5650956 | Current amplification type mask-ROM | Jung-Dal Choi, Sung-bu Jun | 1997-07-22 |