| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 32 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements | |
| #3 | Machines | |
| #4 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Jet-propulsion plants | |
| #2 | Steam turbines | |
| #3 | Non-positive-displacement pumps | |
| #4 | Gas-turbine plants | |
| #5 | Pipes | |
| #6 | Burners | |
| #7 | Gas-turbine combustion chambers | |
| #8 | Venting or aerating devices | |
| #9 | Pistons and sealings | |
| #10 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Frank Bernard Halford | 19 |
| #2 | Limited The De Havilland Engin | 6 |
| #3 | George Frederick Clarke | 5 |
| #4 | Arthur Valentine Cleaver | 5 |
| #5 | David Mark Cockburn | 3 |
| #6 | Leonard Stanley Snell | 2 |
| #7 | William Hammett Arscott | 2 |
| #8 | William Ker Wilson | 2 |
| #9 | Francis Donald Allen | 1 |
| #10 | Denis Lawrence Lofts | 1 |