| # | Country | Total Patents | |
|---|---|---|---|
| #1 | WIPO (World Intellectual Property Organization) | 4 | |
| #2 | China | 2 | |
| #3 | EPO (European Patent Office) | 2 | |
| #4 | Republic of Korea | 2 | |
| #5 | Hong Kong | 1 |
| # | Industry | |
|---|---|---|
| #1 | Computer technology | |
| #2 | IT methods for management | |
| #3 | Digital networks |
| # | Technology | |
|---|---|---|
| #1 | Electric digital data processing | |
| #2 | Data processing systems | |
| #3 | Digital information transmission |
| # | Name | Total Patents |
|---|---|---|
| #1 | Okamoto Akiyoshi | 9 |
| #2 | Ishida Masataka | 7 |
| #3 | Masataka Okamoto Akiyoshi Ishi | 2 |
| Publication | Filing date | Title |
|---|---|---|
| WO2005088460A1 | System for preventing unauthorized use of digital content | |
| WO2004102395A1 | System for preventing unauthorized use of digital content |