Takashi Katsura
14Patents
7h-index
21Co-inventors
66Inventor score
Filing activity: Oct 5, 1984 → Aug 18, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6477276B1 | Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon | Electricity | 56 | Expired |
| US7356700B2 | Digital watermark-embedding apparatus and method, digital watermark-detecting apparatus and method, and recording medium | Physics | 48 | Expired |
| US6693965B1 | Apparatus for and method of embedding and extracting digital information, and medium having program for carrying out the method recorded thereon | Electricity | 31 | Expired |
| US6898297B2 | Digital watermark embedding method, digital watermark extracting method, recording medium, image recording device, and image replaying device | Physics | 22 | Expired |
| US6639997B1 | Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon | Electricity | 10 | Expired |
| US7127614B2 | Justification authenticating system, personal certificate issuing system, and personal certificate | Electricity | 10 | Expired |
| US7315621B2 | Digital watermark-embedding apparatus, digital watermark-embedding method, and recording medium | Physics | 7 | Expired |
| US7003666B1 | Apparatus and method for embedding information for tamper detection and detecting tamper and recording medium having program for carrying out the method recorded thereon | Physics | 5 | Expired |
| US6728409B2 | Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon | Electricity | 5 | Expired |
| US6788821B2 | Digital information embedding/extracting apparatus and method, and medium including a program for executing the method recorded thereon | Physics | 5 | Expired |
| US7142692B2 | Reproduction equipment, reproduction equipment specifying equipment, reproduction equipment specifying system and methods and recording media for said equipment and system | Electricity | 4 | Expired |
| US7680296B2 | Information embedding device and program for changing a number of points that exist on sides of a polygon | Physics | 1 | Expired |
| US7187782B2 | Digital watermark-embedding apparatus, digital watermark-embedding method, and recording medium having recoded therein a program for performing the digital watermark-embedding method | Physics | 0 | Expired |
| US4600862A | Discharge lamp operation apparatus | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.