| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 9 | |
| #2 | United Kingdom | 3 | |
| #3 | Germany | 2 | |
| #4 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Control | |
| #3 | Electrical machinery and energy | |
| #4 | Basic materials chemistry | |
| #5 | Machines | |
| #6 | Basic communication technologies | |
| #7 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Locks | |
| #2 | Registering devices | |
| #3 | Unspecified technologies | |
| #4 | Acetylene production | |
| #5 | Amplifiers | |
| #6 | Lighting device details | |
| #7 | Venting or aerating devices | |
| #8 | Producer gas production | |
| #9 | Incandescent mantles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Cadenel Louis | 9 |
| #2 | Leduc Louis Leandre | 1 |
| #3 | Louis Cadenel | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB354192A | Improvements in and relating to low frequency amplifiers | |
| GB321880A | Improvements in and relating to valve-cocks | |
| US1573802A | Electric safety combination lock | |
| GB211933A | Electric safety combination lock | |
| US1085347A | Electromagnetic lock. |