Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8990031 | Torsional resonance frequency measuring device and method | Yun-Yuan Chang | 2015-03-24 |
| 8303256 | Blade pitch driving apparatus for wind driven generator | Chien-Chiang Tung, Yun-Yuan Chang | 2012-11-06 |
| 7518257 | Hybrid power-generating device | Yun-Yuan Chang, Ching-Huei Wu | 2009-04-14 |
| 7449794 | Wind turbine with self-contained power system | Yun-Yuan Chang, Ching-Huei Wu | 2008-11-11 |
| 6008623 | Charge equalizer or series of connected battery strings | Tshaw-Chuang Chen | 1999-12-28 |