Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5621946 | Suction tube mounted with an auxiliary brush of a vacuum cleaner | — | 1997-04-22 |
| 5596236 | Motor capable of using high or low voltage | Jin Bang Lee, Byung-Cheol Choi, Seon Kyu Kim | 1997-01-21 |