| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 38 | |
| #2 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Telecommunications | |
| #3 | Basic communication technologies | |
| #4 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Radio navigation | |
| #2 | Transmission | |
| #3 | Electric discharge tubes | |
| #4 | Amplifiers | |
| #5 | Antennas | |
| #6 | Measuring electric variables | |
| #7 | Automatic control of oscillations | |
| #8 | Waveguides | |
| #9 | Pulse technique | |
| #10 | Generation of oscillations |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lehmann Gerard Jules | 1 |
| #2 | Lehmann Gerard-Jules | 1 |
| #3 | Jules Lehmann Gerard | 1 |
| #4 | Gerard Lehmann | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2285669A | Antenna | |
| US2230160A | Radio device for measuring angles |