Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6810892 | Self-tilting connector mechanism of an umbrella | — | 2004-11-02 |
| 6761180 | Dual direction-swinging device for an umbrella | — | 2004-07-13 |
| 6722381 | Mechanism for umbrella self lock operation | — | 2004-04-20 |
| 6674780 | Gas drawing/refilling and sealing structure for gas laser | — | 2004-01-06 |