Robert D. Powell
22Patents
17h-index
1Co-inventors
67Inventor score
Filing activity: Jul 31, 1992 → Sep 22, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5721788A | Method and system for digital image signatures | Electricity | 689 | Expired |
| US5809160A | Method for encoding auxiliary data within a source signal | Electricity | 283 | Expired |
| US5930377A | Method for image encoding | Electricity | 209 | Expired |
| US6157905A | Identifying language and character set of data representing text | Physics | 101 | Expired |
| US6628801B2 | Image marking with pixel modification | Electricity | 96 | Expired |
| US6385330B1 | Method for encoding auxiliary data within a source signal | Electricity | 80 | Expired |
| US6137892A | Data hiding based on neighborhood attributes | Electricity | 53 | Expired |
| US7978876B2 | Hiding codes in input data | Electricity | 38 | Active |
| US6072888A | Method for image encoding | Electricity | 37 | Expired |
| US6678392B2 | Method for encoding auxiliary data within a source signal | Electricity | 32 | Expired |
| US6459803B1 | Method for encoding auxiliary data within a source signal | Electricity | 32 | Expired |
| US6614915B2 | Image capture and marking | Electricity | 26 | Expired |
| US6317505A | Image marking with error correction | Electricity | 24 | Expired |
| US6307950A | Methods and systems for embedding data in images | Electricity | 23 | Expired |
| US7280672B2 | Image data processing | Electricity | 22 | Active |
| US7062070B2 | Image marking adapted to the image | Electricity | 20 | Expired |
| US7068811B2 | Protecting images with image markings | Electricity | 19 | Expired |
| US6301369A | Image marking to permit later identification | Electricity | 17 | Expired |
| US7412074B2 | Hiding codes in input data | Electricity | 17 | Active |
| US7068812B2 | Decoding hidden data from imagery | Electricity | 17 | Expired |
| US7136503B2 | Encoding hidden data | Electricity | 8 | Expired |
| US7593545B2 | Determining whether two or more creative works correspond | Electricity | 5 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.