| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Sweden | 8 | |
| #2 | Switzerland | 4 | |
| #3 | France | 3 | |
| #4 | Austria | 2 | |
| #5 | Denmark | 2 | |
| #6 | United Kingdom | 2 | |
| #7 | Germany | 1 | |
| #8 | Italy | 1 | |
| #9 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Electrical machinery and energy | |
| #3 | Computer technology | |
| #4 | Machine tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hagdahl E | 3 |
| #2 | Berglund N | 2 |
| #3 | Berglund H | 2 |
| #4 | Lidman I | 1 |
| #5 | Karlsson S | 1 |
| #6 | Karlsson I | 1 |
| #7 | Hagdahl Johan | 1 |
| #8 | Berglund N A | 1 |
| #9 | Johan Hagdahl | 1 |
| #10 | Berglund Nils Axel Hugo Birger | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1340152A | Housing for instruments such as electricity meters | |
| DE2215271A1 | THREE-PHASE METER | |
| GB1293064A | Apparatus housings having provision for lead-sealing |