| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Gearing | |
| #2 | Aeroplanes | |
| #3 | Vehicle drive control systems |
| # | Name | Total Patents |
|---|---|---|
| #1 | Jean Kopp | 7 |
| #2 | Kopp Jean | 5 |
| Publication | Filing date | Title |
|---|---|---|
| ES172227A1 | Transmission mechanism without scaling with rolling bodies | |
| CA459388A | Infinitely variable frictional change-speed gear | |
| CA435408A | Propeller blade adjusting means |