Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8278572 | Electromagnetic induction handwriting system and coordinate determining method thereof | — | 2012-10-02 |
| 8124892 | Electromagnetic manuscript input apparatus and method thereof | — | 2012-02-28 |
| 7843440 | Scrolling electronic whiteboard | Chin-Yen Chen | 2010-11-30 |
| 7015401 | Image processing system with handwriting input function and the method for forming the same | — | 2006-03-21 |
| 6862018 | Cordless pressure-sensitivity and electromagnetic-induction system with specific frequency producer and two-way transmission gate control circuit | — | 2005-03-01 |
| 6787715 | N-shaped antenna loops of digitizer tablet for reducing antenna switches and the method for locating the cordless pen | Ching-Chuan Chao | 2004-09-07 |
| 6717574 | Feedback peak detector fitted wireless handwriting tablet | — | 2004-04-06 |
| 6636184 | Antenna layout and coordinate positioning method for electromagnetic-induction systems | — | 2003-10-21 |
| 6485306 | Locus-recordable portable handwriting device | — | 2002-11-26 |
| 6180894 | Dual mode digitizer tablet system | Ching-Chuan Chao | 2001-01-30 |