| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 7 | |
| #2 | United Kingdom | 4 | |
| #3 | Switzerland | 1 | |
| #4 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Servomotors | |
| #3 | Machines | |
| #4 | Positive-displacement engines | |
| #5 | Pistons and sealings | |
| #6 | Rotary-pistons | |
| #7 | Rotary pistons |
| # | Name | Total Patents |
|---|---|---|
| #1 | De Transmission Societe D Appa | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB373064A | Elastic coupling | |
| DE478981C | Liquid engine with six cylinders arranged in a star shape | |
| GB165033A | Improvements in hydraulic rotary engines | |
| GB163707A | Continuously acting intensifier for the supply of hydraulic presses, jacks and the like |