| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 4 | |
| #2 | United Kingdom | 2 | |
| #3 | Canada | 1 | |
| #4 | Switzerland | 1 | |
| #5 | Germany | 1 | |
| #6 | Finland | 1 | |
| #7 | France | 1 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Electrical machinery and energy | |
| #3 | Telecommunications | |
| #4 | Control |
| # | Technology | |
|---|---|---|
| #1 | Measuring temperature | |
| #2 | Electric switches | |
| #3 | Alarm systems | |
| #4 | Telephonic communication |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hansen Hans Christian | 2 |
| #2 | Christian Hansen Hans | 2 |
| #3 | Telefonalarm Aktieselskab Dans | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE857919C | Temperature switch for fire alarm systems | |
| GB647359A | An electric thermo-switch for fire alarm systems | |
| GB648983A | An electric thermo-switch for fire alarm systems | |
| US2556582A | Thermoelectric switch | |
| CA488863A | Thermo-switch for fire alarm systems |