| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 3 | |
| #2 | Israel | 3 | |
| #3 | Japan | 3 | |
| #4 | WIPO (World Intellectual Property Organization) | 3 | |
| #5 | China | 2 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Computer technology |
| # | Technology | |
|---|---|---|
| #1 | Television | |
| #2 | Electric digital data processing | |
| #3 | Image data processing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Tanaka Masafumi | 7 |
| #2 | Tanaka Masabumi | 3 |
| #3 | Masafumi Tanaka | 2 |
| #4 | Tanaka M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JP2003259369A | Error concealment method employing electronic watermark of moving picture | |
| JP2003030174A | Dct matrix decomposition method and dct device | |
| JP2002330279A | Method for embedding data in image and method for extracting the data |