| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Norway | 6 | |
| #2 | Austria | 1 | |
| #3 | Belgium | 1 | |
| #4 | Canada | 1 | |
| #5 | Switzerland | 1 | |
| #6 | Germany | 1 | |
| #7 | Denmark | 1 | |
| #8 | United Kingdom | 1 | |
| #9 | Iceland | 1 | |
| #10 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Civil engineering | |
| #3 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Blasting | |
| #2 | Explosive charges | |
| #3 | Hydraulic engineering | |
| #4 | Animal care |
| # | Name | Total Patents |
|---|---|---|
| #1 | Jakobsen Kjell | 12 |
| #2 | Semb Tord Kjaerner | 3 |
| #3 | Kjell Jakobsen | 1 |
| #4 | Semb Tord K | 1 |
| #5 | Tord Kjaerner Semb | 1 |
| #6 | Mikkelsen Trygve | 1 |
| #7 | Semb Tord Kjaerner Ing | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB918313A | Improvements in or relating to a method of excavating rock, ore and the like by blasting, and means for use in said method | |
| CA709169A | Method and means for excavating |