Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6855911 | Pivotable cover for laser cutting machine | — | 2005-02-15 |
| 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 |
| 6622741 | Automatic bending-angle changing structure for umbrella | — | 2003-09-23 |
| 6600128 | Fire alarm device for laser cutting/engraving machine | — | 2003-07-29 |
| 6587356 | Start-up circuit and control for high power isolated boost DC/DC converters | Lizhi Zhu, Fred C. Lee | 2003-07-01 |
| 6580445 | Printing head structure of large-size drafting machine | — | 2003-06-17 |
| 6539629 | Roller shaft on computer character-cutting device and method to manufacture the same | — | 2003-04-01 |
| 6473109 | Ribbon cartridge structure for printing head of large color printer | — | 2002-10-29 |
| 6388228 | Structure of laser sculpturing machine | — | 2002-05-14 |
| 6332471 | Fixing structure for large-size sunshade | — | 2001-12-25 |
| 6259057 | Automatically focusing structure of laser sculpturing machine | — | 2001-07-10 |
| 6230724 | Operation mechanism for a parasol | — | 2001-05-15 |
| 6182917 | Electric stretching/collecting device for a parasol | — | 2001-02-06 |