| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Sweden | 10 | |
| #2 | United States | 3 | |
| #3 | Austria | 1 | |
| #4 | Canada | 1 | |
| #5 | Switzerland | 1 | |
| #6 | Czechoslovakia | 1 | |
| #7 | Germany | 1 | |
| #8 | Denmark | 1 | |
| #9 | Spain | 1 | |
| #10 | Finland | 1 | |
| #11 | France | 1 | |
| #12 | United Kingdom | 1 | |
| #13 | Ireland | 1 | |
| #14 | Israel | 1 | |
| #15 | Italy | 1 | |
| #16 | Norway | 1 | |
| #17 | USSR (Union of Socialist Soviet Republics) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Machine tools | |
| #3 | Mechanical elements | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Shaping of plastics | |
| #2 | Producing goods from plastic | |
| #3 | Pipes | |
| #4 | Certain plastics | |
| #5 | Fillers | |
| #6 | Cutting | |
| #7 | Perforating | |
| #8 | Unspecified technologies | |
| #9 | Sewers | |
| #10 | Turning |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nordstroem Erik Gustav Wendel | 6 |
| #2 | Nordstrom Erik Gustav Wendel | 6 |
| #3 | Nordstroem Erik G W | 3 |
| #4 | Nordstrem Erik Gustav Vendel | 1 |
| #5 | Nordstroem Erik G | 1 |
| Publication | Filing date | Title |
|---|---|---|
| SE9101672D0 | Building component based on tube of extruded plastics - involves tube with single wall smooth interior and external reinforcements | |
| IE40322L | Apparatus for producing a pipe of platics or other extrudable material with a ridgeo outer surface | |
| US3868876A | Apparatus for manufacturing perforated tubes | |
| US3892514A | Apparatus for producing corrugated plastic pipe with holes in the pipe wall |