Isao Echizen
20Patents
10h-index
31Co-inventors
71Inventor score
Filing activity: Sep 1, 1998 → Sep 28, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6418232B1 | Method of authenticating digital-watermark pictures | Physics | 98 | Expired |
| US6563935B1 | Method of extracting digital watermark information and method of judging bit value of digital watermark information | Physics | 47 | Expired |
| US6711276B1 | Control method and apparatus for embedding information in data | Physics | 26 | Expired |
| US7113613B2 | Watermark information detection method | Physics | 26 | Expired |
| US7047407B2 | Network system enabling transmission control | Electricity | 22 | Expired |
| US6728408B1 | Water-mark embedding method and system | Electricity | 18 | Expired |
| US6456727B1 | Method of extracting digital watermark information and method of judging but value of digital watermark information | Physics | 13 | Expired |
| US6584210B1 | Digital watermark image processing method | Physics | 12 | Expired |
| US7065226B1 | Method for embedding information and extracting the same | Physics | 12 | Expired |
| US7293294B2 | Method and apparatus for using contents | Physics | 10 | Expired |
| US7047412B2 | Digital watermark data embedding method, and digital watermark data embeddability analyzing method | Electricity | 10 | Expired |
| US7478432B2 | Method and system for contents control | Electricity | 9 | Expired |
| US6865677B1 | Contents rendering control method, contents reproducing equipment, and contents distribution equipment | Electricity | 8 | Expired |
| US6826291B2 | Method and system for embedding information into contents | Physics | 7 | Expired |
| US6650763B2 | Method of extracting digital watermark information and method of judging bit value of digital watermark information | Physics | 6 | Expired |
| US6970575B2 | Method of extracting digital watermark information and method of judging bit value of digital watermark information | Physics | 3 | Expired |
| US7499565B2 | Method of watermarking for binary images | Physics | 3 | Expired |
| US7310428B2 | Method of detecting digital watermark information | Physics | 2 | Expired |
| US8285998B2 | Dynamic image content tamper detecting device and system | Electricity | 1 | Active |
| US7577843B2 | System and method for controlling contents by plurality of pieces of control information | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.