| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Computer technology | |
| #3 | Telecommunications | |
| #4 | Basic communication technologies | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones | |
| #2 | Speech analysis | |
| #3 | Amplification control | |
| #4 | Telephonic communication | |
| #5 | Measuring distances | |
| #6 | Stereophonic systems |
| # | Name | Total Patents |
|---|---|---|
| #1 | Matsuo Naoshi | 11 |
| #2 | Itou Taisuke | 1 |