Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11919198 | Apparatus for punching anchor bolt insertion hole | Dong Oun Jun | 2024-03-05 |
| 10385282 | Method and system for upgrading and separating hydrocarbon oils | Dong-Woo Cho, Kang Hee Cho, Jong Nam Kim, Bharat Singh Rana, Joon Ho Ko +1 more | 2019-08-20 |
| 8619423 | Fan module having dust-collecting function and dust-collecting unit for the same | Sung Chul Park | 2013-12-31 |
| 6525109 | Process of preparing polycarbonates using microwave | Kil-Yeong Choi, Jae-heung Lee, Young Chan Ko, Il Seok Choi, Kwang Soo Yoon +1 more | 2003-02-25 |
| 6423812 | Process of preparing polycarbonates | Young Chan Ko, Il Seok Choi, Kwang Soo Yoon, Seung Joo Kim, Kil-Yeong Choi +2 more | 2002-07-23 |