| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Norway | 16 | |
| #2 | WIPO (World Intellectual Property Organization) | 2 | |
| #3 | Germany | 1 | |
| #4 | Denmark | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Finland | 1 | |
| #7 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Finishing work on buildings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nogva Olav | 22 |
| Publication | Filing date | Title |
|---|---|---|
| WO9409226A1 | Device in a winding staircase | |
| WO9214010A1 | Device relating to winding staircases | |
| DE3214744A1 | Self-supporting stair arrangement | |
| DK129682A | Device by stairs |