| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 23 | |
| #2 | Germany | 1 | |
| #3 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Telecommunications | |
| #2 | Electrical machinery and energy | |
| #3 | Audio-visual technology | |
| #4 | Packaging and shipping | |
| #5 | Machine tools | |
| #6 | Mechanical elements | |
| #7 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Electric switches | |
| #2 | Telephonic communication | |
| #3 | Selecting | |
| #4 | Clutches and brakes | |
| #5 | Handling thin material | |
| #6 | Magnets and transformers | |
| #7 | Metal wire processing | |
| #8 | Live-saving devices | |
| #9 | Transmission systems | |
| #10 | Advertising |
| # | Name | Total Patents |
|---|---|---|
| #1 | Michel Tchoubritch | 1 |
| #2 | Spanien Simone | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1885491A | Automatic telephone system | |
| DE601629C | Electromagnetic relay for telephone systems |