| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 7 | |
| #2 | Germany | 4 | |
| #3 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Machines | |
| #3 | Telecommunications | |
| #4 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Radio navigation | |
| #2 | Generating mechanical vibrations | |
| #3 | Transmission | |
| #4 | Sound-producing devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Langevin Paul | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB279878A | Improvements in ultra-audible transmitting and receiving apparatus | |
| GB265181A | Improvements in ultra-audible piezo-electric projectors | |
| GB230013A | Improvements in methods and apparatus for the measurement of depths or distances at sea by means of the ultra-audible echo | |
| GB226795A | Improvements in methods and apparatus for sounding and for locating submarine obstacles by means of ultra-audible waves | |
| GB145691A | Improvements relating to the emission and reception of submarine waves |