| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Germany | 3 | |
| #3 | Belgium | 2 | |
| #4 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Computer technology | |
| #2 | Control | |
| #3 | Mechanical elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dale August Leopold Van | 4 |
| #2 | De Louw Alfredo Godefriedus | 1 |
| #3 | Leopold Van Dale August | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1751803A1 | Fluid amplifier | |
| DE1525764A1 | Digital fluid amplifier | |
| GB886565A | Fluid pressure control device | |
| GB887025A | Improvements in pressure stabilising valves | |
| DE1094541B | Device for keeping an adjustable pressure constant in an enclosed space | |
| GB776279A | Improvements in and relating to pneumatic apparatus for operating a number of valvesin sequence |