| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 10 | |
| #2 | Switzerland | 3 | |
| #3 | Austria | 2 | |
| #4 | Canada | 2 | |
| #5 | Germany | 2 | |
| #6 | Finland | 2 | |
| #7 | France | 2 | |
| #8 | United Kingdom | 2 | |
| #9 | United States | 2 | |
| #10 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Transport | |
| #4 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Doors and windows | |
| #2 | Live-saving devices | |
| #3 | Structural elements | |
| #4 | Ships | |
| #5 | General building constructions | |
| #6 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Snitker Jens Christian | 3 |
| #2 | Jens Christian Snitker | 3 |
| #3 | Snitker Jens C | 3 |
| #4 | Christian Snitker Jens | 3 |
| Publication | Filing date | Title |
|---|---|---|
| GB820465A | Improvements in or relating to fire-retarding doors | |
| DE1110391B | Fire retardant door | |
| US2927353A | Fire-retarding door | |
| GB814849A | Improvements in or relating to frames for fire-retarding or fire-proof doors | |
| ES233283A1 | A device in fences for retarding or incombustible doors (Machine-translation by Google Translate, not legally binding) | |
| DE1094436B | Lining with a stop fold for fire doors | |
| US2910739A | Frames for fire-retarding and fire-proof doors | |
| CA615407A | Fire-retarding door | |
| CA594342A | Device in frames for fire-retarding or fire-proof doors |