| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 1 | |
| #2 | Brazil | 1 | |
| #3 | Canada | 1 | |
| #4 | Denmark | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Spain | 1 | |
| #7 | Finland | 1 | |
| #8 | Greece | 1 | |
| #9 | Ireland | 1 | |
| #10 | Japan | 1 | |
| #11 | Netherlands | 1 | |
| #12 | Norway | 1 | |
| #13 | Portugal | 1 | |
| #14 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | AC and DC conversion devices | |
| #2 | Electric motor controls |
| # | Name | Total Patents |
|---|---|---|
| #1 | Duis Arnoldus Theodorus Hendri | 5 |
| #2 | Duis Arnoldus T H | 2 |
| #3 | Aanorudasu Teodorasu Hendorits | 1 |
| #4 | Duis A | 1 |
| #5 | Duis A T H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL7909300A | Device for adjusting a voltage or its frequency. |