| # | Country | Total Patents | |
|---|---|---|---|
| #1 | WIPO (World Intellectual Property Organization) | 5 | |
| #2 | United States | 3 | |
| #3 | China | 2 | |
| #4 | Australia | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Digital networks | |
| #2 | Telecommunications | |
| #3 | Computer technology | |
| #4 | Basic communication technologies | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Digital information transmission | |
| #2 | Telephonic communication | |
| #3 | Electric digital data processing | |
| #4 | Special measuring | |
| #5 | Code conversion | |
| #6 | Selecting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nakanuma Tadashi | 13 |
| Publication | Filing date | Title |
|---|---|---|
| WO2018131176A1 | Data communication method | |
| JP2011205168A | Local telephone network | |
| US5434564A | Method and apparatus for producing pulses corresponding in number to the amount of changes in a physicial quantity |