| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 10 | |
| #2 | Spain | 1 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Telecommunications | |
| #2 | Measurement | |
| #3 | Electrical machinery and energy | |
| #4 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Telephonic communication | |
| #2 | Radio navigation | |
| #3 | Loudspeakers and microphones | |
| #4 | AC and DC conversion devices | |
| #5 | Transmission |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schutz Nicolas-Pierre | 2 |
| Publication | Filing date | Title |
|---|---|---|
| ES209233A1 | An ultrasonorous polling device to measure and simultaneously control the position of the train during fishing and fishing (Machine-translation by Google Translate, not legally binding) | |
| GB711139A | Improvements in echo sounding apparatus |