Zu-Wen Chao
18Patents
5h-index
16Co-inventors
59Inventor score
Filing activity: Nov 8, 1990 → May 5, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5748602A | Single-lens optical pick-up head for accessing a DVD disc and a CD disc by switching between two optical states | Physics | 12 | Expired |
| US5745465A | Digital video disc pick-up head system | Physics | 10 | Expired |
| US6341116B1 | Compact optical pick-up head employing non-diffractive element | Physics | 9 | Expired |
| US5748574A | Double focal-point magneto-optic pick-up head | Physics | 8 | Expired |
| US5712843A | Miniature optical access head apparatus | Physics | 5 | Expired |
| US6415400B1 | Method of managing defect areas on an erasable optical disc in a dynamic manner | Physics | 5 | Expired |
| US5442415A | Armless transparency projector | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6370104B1 | DVD reading-writing pick-up head employing multiple wavelengths | Physics | 3 | Expired |
| US5278811A | Magneto-optic recording and playback system | Physics | 3 | Expired |
| US5438386A | Coaxial master-slave lens photographing apparatus | Physics | 3 | Expired |
| US7190654B2 | Disc burner and its control method | Physics | 2 | Expired |
| US5146515A | Structure of lens combination for optical fiber fine displacement detecting system | Physics | 2 | Expired |
| US6343059B1 | Reading-writing pickup head | Physics | 2 | Expired |
| US7197163B2 | Watermark embedding method based on DCT subband image characters | Physics | 1 | Expired |
| US5715102A | Beam shaper device for optical read/write heads | Physics | 1 | Expired |
| US6483799B1 | Rewritable DVD-RAM disc | Physics | 0 | Expired |
| US7376342B2 | Method of determining disc type for disc burners | Physics | 0 | Active |
| US7383585B2 | Optical discs with controllable access times and method of the same | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.