| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 4 | |
| #2 | Canada | 3 | |
| #3 | Switzerland | 3 | |
| #4 | France | 3 | |
| #5 | United Kingdom | 3 | |
| #6 | Norway | 3 | |
| #7 | Austria | 2 | |
| #8 | United States | 2 | |
| #9 | Germany | 1 | |
| #10 | Spain | 1 | |
| #11 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Macromolecular chemistry and polymers | |
| #3 | Machines | |
| #4 | Basic materials chemistry | |
| #5 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Christoffersen Christen | 5 |
| #2 | Soerensen K | 4 |
| #3 | Christen Christoffersen | 4 |
| #4 | Karl-Otto Sorensen | 4 |
| #5 | Sorensen Karl-Otto | 4 |
| #6 | Christoffersen C | 3 |
| #7 | Soerensen Karl-Otto | 1 |
| #8 | Cristoffersen C | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1199452A | Method of Producing Wooden Boards. | |
| US3418159A | Method for fire-proofing wood | |
| US3498877A | Methods of producing fire resisting wooden articles | |
| GB1045113A | Method of producing fire resisting wooden boards or panels | |
| CA759898A | Method of impregnating porous surfaces | |
| CA787383A | Method of producing fire resisting wooden boards or panels | |
| CA814399A | Method of producing wooden boards |