Issued Patents All Time
Showing 26–50 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6199571 | Lightening multiple-fold automatic umbrella with control module | Jung-Jen Chang | 2001-03-13 |
| 6186157 | Windproof umbrella having compact folded structure | Jung-Jen Chang | 2001-02-13 |
| 6176246 | Multiple-fold automatic umbrella with simplified structure and shortened length | Jung-Jen Chang | 2001-01-23 |
| 6164303 | Slim rib assembly for umbrella | Jung-Jen Chang | 2000-12-26 |
| 6112755 | Automatic penta-fold umbrella | Jung-Jen Chang | 2000-09-05 |
| 6095169 | Automatic umbrella having rib assembly formed with light grooved rib reinforced resilient rib | Jung-Jen Chang | 2000-08-01 |
| 6095171 | Multiple-fold windproof umbrella with compact restoring mechanism | Jung-Jen Chang | 2000-08-01 |
| 6058952 | Simplified flat top umbrella | Jung-Jen Chang | 2000-05-09 |
| 6039063 | Multiple-fold windproof umbrella for preventing sagging of umbrella cloth | Jung-Jen Chang | 2000-03-21 |
| 6035873 | Multiple-fold umbrella having gradationally convex telescopic shaft | Jung-Jen Chang | 2000-03-14 |
| 6024109 | Reliably controllable windproof umbrella | Jung-Jen Chang | 2000-02-15 |
| 6006770 | Reliably controllable windproof umbrella | Jung-Jen Chang | 1999-12-28 |
| 5931175 | Umbrella rib assembly having light grooved rib reinforced with resilient rib | Jung-Jen Chang | 1999-08-03 |
| 5791359 | Lightening multiple-fold automatic umbrella | Jung-Jen Chang | 1998-08-11 |
| 5740823 | Lightening safety automatic umbrella | Jung-Jen Chang | 1998-04-21 |
| 5720311 | Telescopic umbrella shaft means with concave hexagonal sides | Jung-Jen Chang | 1998-02-24 |
| 5706844 | Pocketable folding umbrella | Jung-Jen Chang | 1998-01-13 |
| 5690132 | Catch-free safety umbrella | Jung-Jen Chang | 1997-11-25 |
| 5626161 | Multiple-fold automatic umbrella with simplified reliable control means | Jung-Jen Chang | 1997-05-06 |
| 5615697 | Pocketable folding umbrella with foldably sandwiched ribs | Jung-Jen Chang | 1997-04-01 |
| 5564449 | Anti-twisting automatic umbrella | Jung-Jen Chang | 1996-10-15 |
| 5533535 | Pocketable folding umbrella | Jung-Jen Chang | 1996-07-09 |
| 5505222 | Multiple-fold automatic umbrella with simplified control means | Jung-Jen Chang | 1996-04-09 |
| 5492140 | Multiple-fold automatic umbrella with simplified grip | Jung-Jen Chang | 1996-02-20 |
| 5476113 | Umbrella for catching golf ball | Jung-Jen Chang | 1995-12-19 |