| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Netherlands | 5 | |
| #2 | Germany | 2 | |
| #3 | France | 2 | |
| #4 | Switzerland | 1 | |
| #5 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Mechanical elements | |
| #3 | Electrical machinery and energy | |
| #4 | Agriculture | |
| #5 | Control | |
| #6 | Medical technology |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ruumpol Geurt Johannes | 2 |
| #2 | Ruumpol G | 1 |
| #3 | Ruumpol Geurt J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL8201178A | Rudder position detector using pick=up coils - detecting changes in magnetic field due to movement of asymmetrical plate mounted on rotatable shaft | |
| NL8201102A | Control column for handicapped person's vehicle - has spring-operated mechanism to return control to neutral position when released | |
| NL8002952A | Control device, especially for drive motors of a vehicle for the disabled. | |
| NL8002727A | Continuous electric driving trade. | |
| CH646254A5 | Electronic pulsator tester | |
| NL7904903A | Identification system. |