Ammon E. Gustafson
26Patents
19h-index
14Co-inventors
74Inventor score
Filing activity: Apr 1, 1998 → Aug 11, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6614914B1 | Watermark embedder and reader | Electricity | 936 | Expired |
| US6574350B1 | Digital watermarking employing both frail and robust watermarks | Electricity | 243 | Expired |
| US6636615B1 | Methods and systems using multiple watermarks | Physics | 229 | Expired |
| US6332031A | Multiple watermarking techniques for documents and other data | Physics | 198 | Expired |
| US6728390B2 | Methods and systems using multiple watermarks | Physics | 131 | Expired |
| US6744906B2 | Methods and systems using multiple watermarks | Physics | 111 | Expired |
| US7054462B2 | Inferring object status based on detected watermark data | Electricity | 108 | Expired |
| US6850626B2 | Methods employing multiple watermarks | Electricity | 103 | Expired |
| US6442284B1 | Watermark detection utilizing regions with higher probability of success | Physics | 96 | Expired |
| US8144368B2 | Automated methods for distinguishing copies from original printed objects | Electricity | 75 | Active |
| US7266217B2 | Multiple watermarks in content | Electricity | 75 | Active |
| US7171020B2 | Method for utilizing fragile watermark for enhanced security | Physics | 75 | Expired |
| US7013021B2 | Watermark detection utilizing regions with higher probability of success | Electricity | 70 | Expired |
| US7054463B2 | Data encoding using frail watermarks | Electricity | 69 | Expired |
| US6804376B2 | Equipment employing watermark-based authentication function | Electricity | 56 | Expired |
| US7539325B2 | Documents and methods involving multiple watermarks | Physics | 55 | Expired |
| US6915002B2 | Multi-carrier watermarks using carrier signals modulated with auxiliary messages | Physics | 50 | Expired |
| US6763122B1 | Watermarking an image in color plane separations and detecting such watermarks | Electricity | 45 | Expired |
| US7400743B2 | Methods to evaluate images, video and documents | Physics | 27 | Active |
| US6594373B1 | Multi-carrier watermarks using carrier signals modulated with auxiliary messages | Physics | 18 | Expired |
| US7574014B2 | Digital watermark detection utilizing host carrier information | Electricity | 15 | Active |
| US7978875B2 | Signal processing utilizing host carrier information | Electricity | 13 | Active |
| US7480393B2 | Optimized digital watermarking functions for streaming data | Physics | 10 | Active |
| US7957552B2 | Optimized digital watermarking functions for streaming data | Physics | 2 | Active |
| US6286105A | Method for implementing link-level security to enforce access privileges | Physics | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.