Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6722900 | Power plug with elastic pieces for positioning | Seung Heon Lee | 2004-04-20 |
| 4791833 | Reduction gear mechanism for motor-driven drill incorporating speed changing mechanism | Yasuharu Sakai, Tadashi Yasui | 1988-12-20 |