| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 10 | |
| #2 | Switzerland | 6 | |
| #3 | Belgium | 3 | |
| #4 | EPO (European Patent Office) | 3 | |
| #5 | France | 3 | |
| #6 | United States | 3 | |
| #7 | Austria | 1 | |
| #8 | Czechoslovakia | 1 | |
| #9 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Environmental technology | |
| #3 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Burners | |
| #2 | Fluid fuel combustion | |
| #3 | Domestic stoves | |
| #4 | Combustion residues removal | |
| #5 | Fluid heaters | |
| #6 | Supplying fuel to combustion device | |
| #7 | Vehicle wheels |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dreizler Walter | 19 |
| #2 | Walter Dreizler | 5 |
| #3 | Dreizler Ulrich | 4 |
| #4 | Dreizler Walter Dipl Ing | 1 |
| #5 | Dreizler Walter Dipl-Ing | 1 |
| #6 | Dreizler Ulrich Dipl-Ing | 1 |
| #7 | Dreizler Ulrich Dipl Ing | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0347834A2 | Burner head for a forced-draft gas burner | |
| DE3742143A1 | Method for decontaminating waste gas of a boiler installation or boiler installation with external waste gas recycling | |
| EP0271111A2 | Boiler using exterior recycling of combustion gases | |
| US4903615A | Atmospheric gas heating unit with external recycling of exhaust gas to reduce nOx | |
| DE3643797A1 | ATMOSPHERIC GAS HEATER WITH EXTERNAL EXHAUST GAS RECIRCULATION FOR NO (DOWN ARROW) X (DOWN ARROW) REDUCTION | |
| GB1246050A | Improvements in or relating to atmospheric gas burners |