| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 52 | |
| #2 | United Kingdom | 4 | |
| #3 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Telecommunications | |
| #2 | Electrical machinery and energy | |
| #3 | Measurement | |
| #4 | Audio-visual technology | |
| #5 | Basic communication technologies | |
| #6 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Radio navigation | |
| #2 | Transmission | |
| #3 | Electric discharge tubes | |
| #4 | Antennas | |
| #5 | Waveguides | |
| #6 | Multiplex communication | |
| #7 | Loudspeakers and microphones | |
| #8 | Burners | |
| #9 | Amplifiers | |
| #10 | Electrically-conductive connections |
| # | Name | Total Patents |
|---|---|---|
| #1 | Henri Chireix | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB526860A | Improvements in or relating to direct reading radio direction finders | |
| GB157889A | Improvements in duplex telegraphy and telephony | |
| GB154908A | Improved means for regulating the frequency of alternating currents |