| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 7 | |
| #2 | United Kingdom | 3 | |
| #3 | Germany | 2 | |
| #4 | United States | 2 | |
| #5 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Chemical engineering | |
| #3 | Machines | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Pumps | |
| #2 | Internal-combustion piston engines | |
| #3 | Separation | |
| #4 | Vehicle tyre repairing | |
| #5 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Pretot Marcel | 7 |
| #2 | Marcel Pretot | 3 |
| #3 | Francois Ullmann | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1749260A | Device for removing solid particles from flue gases | |
| GB281651A | Improvements in or relating to the removal of solid particles from flue gases | |
| GB216157A | Arrangement for cooling air-compressors and improving the output therefrom | |
| US1535038A | Internal-combustion engine | |
| GB139473A | Improvements in internal combustion engines |