| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 3 | |
| #2 | Australia | 2 | |
| #3 | Canada | 2 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | Netherlands | 1 | |
| #6 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Mechanical elements | |
| #3 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Special measuring | |
| #2 | Mechanical control devices | |
| #3 | Electric motor controls |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ruumpol Geurt Johannes | 5 |
| #2 | Ruumpol Geurt J | 5 |
| Publication | Filing date | Title |
|---|---|---|
| NL8401391A | Contactless electrical control device. |