| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Sweden | 3 | |
| #2 | Belgium | 1 | |
| #3 | Brazil | 1 | |
| #4 | Canada | 1 | |
| #5 | Switzerland | 1 | |
| #6 | Germany | 1 | |
| #7 | France | 1 | |
| #8 | United Kingdom | 1 | |
| #9 | Italy | 1 | |
| #10 | Japan | 1 | |
| #11 | Netherlands | 1 | |
| #12 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Registering devices | |
| #2 | Coin-freed | |
| #3 | Locks |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lundgren Sten T | 2 |
| #2 | Lundgren Sten | 2 |
| #3 | Lundgren S | 2 |
| #4 | Lundgren S T | 1 |
| #5 | Nordstrand C | 1 |
| #6 | Suten Randogurein | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2753941A1 | ELECTRONIC IDENTIFICATION DEVICE OF KEY TYPE |