| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Finland | 2 | |
| #2 | Sweden | 2 | |
| #3 | United States | 2 | |
| #4 | Austria | 1 | |
| #5 | Germany | 1 | |
| #6 | Denmark | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Netherlands | 1 | |
| #9 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Shaping clay |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ekstroem Stig Ove Mauritz | 5 |
| #2 | Ekstroem Stig O M | 2 |
| #3 | Ekstrom S O M | 2 |
| #4 | Ekstroem S O M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4289172A | Reinforced bitumen pipes and process for their manufacture |