Roger Chang
12Patents
6h-index
19Co-inventors
63Inventor score
Filing activity: Sep 11, 1986 → Jul 24, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4915237A | Comprehensive container inspection system | Physics | 69 | Expired |
| US4914289A | Article inspection system for analyzing end and adjacent sides | Physics | 49 | Expired |
| US5203469A | Tool box | Performing Operations; Transporting | 47 | Expired |
| US4731649A | Oblique illumination for video rim inspection | Physics | 40 | Expired |
| US4750035A | Video container inspection with collimated viewing of plural containers | Physics | 21 | Expired |
| US7297285B2 | Manufacturing process of emboss type flexible or rigid printed circuit board | Electricity | 9 | Expired |
| US7505282B2 | Laminated bond of multilayer circuit board having embedded chips | Electricity | 3 | Active |
| US7892412B2 | Manufacturing process of embedded type flexible or rigid printed circuit board | Electricity | 1 | Active |
| US7603771B2 | Method of manufacturing a combined multilayer circuit board having embedded chips | Emerging Cross-Sectional Technologies | 1 | Active |
| US11473014B2 | Liquid-crystal lens | Chemistry; Metallurgy | 1 | Active |
| US6978817B2 | Method for manufacturing fluoropolymer compound plate and device for manufacturing the same | Emerging Cross-Sectional Technologies | 0 | Expired |
| US10676671B2 | Method of reducing ODF mura in polymer stabilised liquid crystal displays | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.