Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11545693 | Flag forming device after laser notching of secondary batteries for electric vehicles | — | 2023-01-03 |
| 9695004 | Removal equipment for an electric conduction plate of electric double layer capacitors battery for electric vehicle | — | 2017-07-04 |
| 5238436 | Lamp air exhausting apparatus | Duk-seo Park | 1993-08-24 |
| 4820952 | Film speaker using a piezo-electric element | — | 1989-04-11 |
| 4817152 | Stereo system with piezo-electrical film speaker | — | 1989-03-28 |