| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 27 | |
| #2 | United Kingdom | 2 | |
| #3 | Germany | 1 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods | |
| #2 | Control | |
| #3 | Mechanical elements | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Sound-producing devices | |
| #2 | Alarm systems | |
| #3 | Venting or aerating devices | |
| #4 | Shafts | |
| #5 | Vehicle signalling and lighting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Chollet Louis | 27 |
| #2 | Vasseur Arthur | 1 |
| #3 | Louis Chollet | 1 |
| #4 | Gobert Rene | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB154432A | Improvements in and relating to electrically operated diaphragm horns | |
| US1391367A | Sound signaling device | |
| GB138532A | Improvements in fluid-pressure operated sound signalling devices |