| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Spain | 4 | |
| #3 | United States | 2 | |
| #4 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Electrical machinery and energy | |
| #3 | Basic materials chemistry | |
| #4 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Burners | |
| #2 | Portable lighting devices | |
| #3 | Producer gas production | |
| #4 | Internal-combustion piston engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Deprez Oscar | 8 |
| #2 | Richir Armand | 8 |
| #3 | Devis Auguste | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB191102198A | Improved Two-stroke-cycle Valveless Internal-combustion Engine. | |
| US1061528A | Valveless two-cycle motor. | |
| GB191013019A | Improvements in Carburetted Air Stoves and Lamps. | |
| GB191001910A | Improvements in and relating to Carburetted Air Stoves and Lamps. | |
| GB191001909A | Improvements in Carburetted Air Lamps and Stoves. | |
| US994985A | Carbureter. | |
| GB190718862A | A Gas or Petrol Motor Worked with Multiple Rotating Cylinders. |