| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 14 | |
| #2 | United Kingdom | 3 | |
| #3 | EPO (European Patent Office) | 2 | |
| #4 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements | |
| #3 | Civil engineering | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Pumps | |
| #2 | Venting or aerating devices | |
| #3 | Cyclically operating valves | |
| #4 | Earth drilling | |
| #5 | Safety devices | |
| #6 | Servomotors | |
| #7 | Pipes | |
| #8 | Lubricating | |
| #9 | Mining | |
| #10 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Volk Heinrich Rudolf | 2 |
| #2 | Kamm Willibald Dipl-Ing | 2 |
| #3 | Ryzner Clemens | 1 |
| #4 | Schwittek Reinhard Dipl-Ing | 1 |
| #5 | Plaas Heinrich | 1 |
| #6 | Scheven August Von | 1 |
| #7 | Poeting Hans-Juergen | 1 |
| #8 | Meyer Otto | 1 |
| #9 | Thomas Walter | 1 |
| #10 | Erven Wilhelm | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0693647A1 | Position indicator for hydraulically actuated valves | |
| EP0476616A1 | Control for piston pumps | |
| FR1444926A | Device forming a control valve or distributor valve for a pump or the like and its various applications | |
| GB1004747A | Fluid pressure infusion devices | |
| GB934206A | Hydraulic oscillatory drive | |
| GB524055A | Improvements in fluid operated pumps | |
| DE692411C | Flushing head for rock drills | |
| DE697303C | Diaphragm pump | |
| DE695521C | Automatic control for liquid pumps |