| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 14 | |
| #2 | Switzerland | 4 | |
| #3 | France | 3 | |
| #4 | United Kingdom | 2 | |
| #5 | United States | 2 | |
| #6 | EPO (European Patent Office) | 1 | |
| #7 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines | |
| #3 | Medical technology | |
| #4 | Measurement | |
| #5 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Servomotors | |
| #3 | Pumps | |
| #4 | Rotary-pistons | |
| #5 | Pipes | |
| #6 | Operating tables | |
| #7 | Pistons and sealings | |
| #8 | Measuring length, angles and areas | |
| #9 | Chairs and beds |
| # | Name | Total Patents |
|---|---|---|
| #1 | Knapp Horst | 6 |
| #2 | Knapp Juergen M | 4 |
| #3 | Horst Knapp | 3 |
| #4 | Knapp Juergen Michael | 2 |
| #5 | Hoeck Johannes Dipl Ing | 1 |
| #6 | Knapp H | 1 |
| #7 | Knapp Horst Dipl Ing | 1 |
| #8 | Wahl Guenter Dipl-Ing | 1 |
| #9 | Strobel Georg Dipl Ing | 1 |
| #10 | Lindemann Christoph Dipl Ing | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE4301308A1 | Hydraulic valve | |
| DE4224659C1 | Electrohydraulic drive system for patient table or chair - uses hydraulic unit with interchangeable function of hydraulic connections to control unit | |
| EP0451739A2 | Coupling piece | |
| DE4013504A1 | Hydraulic fluid-proportioning valve - has rotary plate with control groove curving round axis of rotation | |
| DE4011756A1 | Hydraulic coupling between two components | |
| DE4002558A1 | Hydraulic cylinder | |
| DE3704332A1 | Hydraulic actuating device | |
| DE3227926A1 | Hydraulic unit | |
| GB1322317A | Hydraulic flow control valve | |
| GB1264019A | Oscillating piston pump |