Youichi Takashima
13Patents
7h-index
11Co-inventors
59Inventor score
Filing activity: Nov 6, 1995 → Aug 6, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6704431B1 | Method and apparatus for digital watermarking | Physics | 73 | Expired |
| US5701343A | Method and system for digital information protection | Physics | 72 | Expired |
| US7164778B1 | Digital watermark embedding method, digital watermark embedding apparatus, and storage medium storing a digital watermark embedding program | Electricity | 46 | Expired |
| US6044463A | Method and system for message delivery utilizing zero knowledge interactive proof protocol | Electricity | 45 | Expired |
| US7072492B2 | Method and apparatus for digital watermarking | Physics | 41 | Expired |
| US6769063B1 | Data converter and recording medium on which program for executing data conversion is recorded | Electricity | 38 | Expired |
| US6011848A | Method and system for message delivery utilizing zero knowledge interactive proof protocol | Electricity | 19 | Expired |
| US7187769B1 | Method and apparatus for evaluating the strength of an encryption | Electricity | 6 | Expired |
| US7860270B2 | Digital watermark embedding method, digital watermark embedding apparatus, and storage medium storing a digital watermark embedding program | Electricity | 3 | Active |
| US7978877B2 | Digital watermark embedding method, digital watermark embedding apparatus, and storage medium storing a digital watermark embedding program | Electricity | 1 | Active |
| US7792323B2 | Digital watermark embedding method, digital watermark embedding apparatus, and storage medium storing a digital watermark embedding program | Electricity | 1 | Active |
| US7817818B2 | Digital watermark embedding method, digital watermark embedding apparatus, and storage medium storing a digital watermark embedding program | Electricity | 1 | Active |
| US7640431B2 | Method and apparatus for digital watermarking | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.