Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9364933 | Jig for Winston cone baffle machining | Sun Choel Yang, Ki Soo Chang, Geon Hee Kim, Sang Yong Lee | 2016-06-14 |
| 8978527 | Long shaft bit having vibration preventing structure | Sun Choel Yang, Ki Soo Chang, Geon Hee Kim | 2015-03-17 |