Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7540033 | Device for opening-closing sun visor of helmet | Young Il Kim, Chang-Seob Lee | 2009-06-02 |
| 7398561 | Device for opening-closing jaw guard of helmet | Young Il Kim, Chang-Seob Lee | 2008-07-15 |