| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Norway | 4 | |
| #2 | Austria | 1 | |
| #3 | Canada | 1 | |
| #4 | German Democratic Republic | 1 | |
| #5 | Germany | 1 | |
| #6 | Finland | 1 | |
| #7 | Sweden | 1 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Street cleaning |
| # | Name | Total Patents |
|---|---|---|
| #1 | Mellingen Knut O | 9 |
| #2 | Mellingen K O | 1 |
| #3 | Mellingen Knut | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE3003712A1 | TRACKING DEVICE FOR FORMING TRACKS IN A SKI TREAD |