Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8109490 | Spring structure having contact-preventing and rigidity-reinforcing function for bed mattress | — | 2012-02-07 |
| 7841032 | Bed mattress using permeable reinforcing member and foaming material, and method of manufacturing the same | Sung-Ho Ahn | 2010-11-30 |
| 7721367 | Bed mattress using permeable reinforcing member and foaming material, and method of manufacturing the same | Sung-Ho Ahn | 2010-05-25 |
| 7677541 | Spring structure for bed mattress | — | 2010-03-16 |