| # | Country | Total Patents | |
|---|---|---|---|
| #1 | WIPO (World Intellectual Property Organization) | 12 | |
| #2 | Sweden | 8 | |
| #3 | EPO (European Patent Office) | 6 | |
| #4 | United States | 4 | |
| #5 | Finland | 3 | |
| #6 | Norway | 2 | |
| #7 | Canada | 1 | |
| #8 | Denmark | 1 | |
| #9 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Electric motor controls | |
| #2 | AC and DC conversion devices | |
| #3 | Climate change mitigation in buildings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Joensson Ragnar | 37 |
| #2 | Jönsson Ragnar | 1 |
| #3 | Hemark Henrik | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO2009070089A1 | Method and system for controlling an electric ac motor | |
| WO2005119900A1 | On-line parameter adaptation in ac motors | |
| EP1723716A1 | Method and control system for an ac induction motor | |
| WO03001656A1 | Multiple stage switch circuit | |
| US7098630B2 | Control means and methods for a transistor switch circuit | |
| US7035118B2 | Control means for a transistor switch circuit | |
| CA1291530C | Switch circuit |