| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | Japan | 3 | |
| #3 | South Africa | 3 | |
| #4 | Italy | 2 | |
| #5 | Sweden | 2 | |
| #6 | United States | 2 | |
| #7 | Australia | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Soldering, welding and flame cutting | |
| #2 | AC and DC conversion devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hedberg John Bengt Goeran | 6 |
| #2 | Hedberg J | 2 |
| #3 | Hedberg John Bengt Goran | 2 |
| #4 | Yon Benguto Geran Hedeberuku | 2 |
| #5 | Hedberg John B G | 1 |
| #6 | Yon Benkuto Geran Hedeberuku | 1 |
| #7 | Hedberg Goran | 1 |
| #8 | Hedberg J B G | 1 |
| #9 | Bengt John | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JPS52136860A | Electric current feeder for arc welding | |
| ZA7702708B | Improvements in or relating to a frequency converter | |
| ZA7702651B | A current unit for arc welding | |
| JPS52131954A | Electric welder | |
| ZA7702389B | An arrangement in electrical welding apparatus |