| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Norway | 2 | |
| #3 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kleppa Erling | 11 |
| #2 | Sevheim Ole | 4 |
| #3 | Stokka Oeyvind | 3 |
| #4 | Pettersen Ståle | 1 |
| #5 | Harestad Kristian | 1 |
| #6 | Pettersen Staale | 1 |
| #7 | Stokka Øyvind | 1 |
| #8 | Tveiten Magnar | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2014299320A1 | Wave-inducing device, casing system and method for cementing a casing in a borehole | |
| US2011067879A1 | Bellows valve |