| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 16 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Electrical machinery and energy | |
| #3 | Telecommunications | |
| #4 | Basic communication technologies | |
| #5 | Machines | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Radio navigation | |
| #2 | Transmission | |
| #3 | Modulation | |
| #4 | Nails | |
| #5 | Generation of oscillations | |
| #6 | Antennas | |
| #7 | Unspecified technologies | |
| #8 | Cables and insulators | |
| #9 | Electric discharge tubes | |
| #10 | Magnets and transformers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Willoughby John A | 16 |
| #2 | Lowell Percival D | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2717570A | Skid attachment for an outboard motor | |
| US1942526A | Radio navigating system | |
| US1898474A | Aircraft landing system | |
| US1896269A | Variable inductance units | |
| US1957481A | Electrical insulator | |
| US1874679A | High power tube system | |
| US1912234A | Radio direction finder | |
| US1961319A | Radio direction finding system | |
| US1903846A | Piloting system | |
| US1959281A | Radio receiving system | |
| US1930868A | Transmitting system | |
| US1922650A | Circuit arrangement | |
| US1884945A | Combined oscillator and modulator system | |
| US1896268A | Modulator system | |
| US1708071A | Radio signal apparatus | |
| US1555345A | Loop antenna |