Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5198953 | Device which opens and closes the hub locker of a digital audio tape cartridge | — | 1993-03-30 |
| 5084799 | Lid locking device for tape cassette | Ryu Moo Yeol, Ryu Dae Ki, Yun Duk Kyun, An Jae Kyu, Hong Sun Kuk +1 more | 1992-01-28 |