| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Sweden | 4 | |
| #2 | Canada | 2 | |
| #3 | Denmark | 2 | |
| #4 | United Kingdom | 2 | |
| #5 | Belgium | 1 | |
| #6 | Germany | 1 | |
| #7 | Egypt | 1 | |
| #8 | Finland | 1 | |
| #9 | France | 1 | |
| #10 | Italy | 1 | |
| #11 | Netherlands | 1 | |
| #12 | Norway | 1 | |
| #13 | New Zealand | 1 | |
| #14 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Environmental technology | |
| #3 | Basic materials chemistry | |
| #4 | Chemical engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hallhagen Rudolf | 4 |
| #2 | Hallhagen Rudolf G | 3 |
| #3 | Mark A | 2 |
| #4 | Hallhagen R | 2 |
| #5 | Hallhagen R G | 2 |
| #6 | G Hallhagen Rudolf | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA1066069A | Oil fence | |
| EG12726A | Oil fenc used for the defining of impurities on a water suace | |
| NZ184174A | Oil fence: elongate web of woven textile material has a double layer portion containing a float and another containing ballast | |
| US4084380A | Oil fence | |
| DE2622929B1 | OIL FENCE | |
| GB1547240A | Fene for confining floating material | |
| CA1059774A | Oil fence | |
| GB1547239A | Fence for confinin gloating material |