| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 23 | |
| #2 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Mechanical elements | |
| #3 | Electrical machinery and energy | |
| #4 | Telecommunications | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Controlling combustion | |
| #2 | Ignition and extinguishing | |
| #3 | Fluid heaters | |
| #4 | Venting or aerating devices | |
| #5 | Testing of structures | |
| #6 | Magnets and transformers | |
| #7 | Transmission systems |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hegwein Georg | 23 |
| Publication | Filing date | Title |
|---|---|---|
| GB795187A | Safety device for fluid fuel burners | |
| DE953903C | Safety device for gas firing systems | |
| DE906081C | Safety device for gas firing systems | |
| DE833402C | Gas-heated liquid heater with an exhaust flap controlled by the low-level liquid safety device |