| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 79 | |
| #2 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Engines, pumps and turbines | |
| #3 | Measurement | |
| #4 | Control |
| # | Name | Total Patents |
|---|---|---|
| #1 | Stern Dipl-Ing Reinhard | 3 |
| #2 | Christian Christians | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE651261C | Pump hot water heating | |
| DE519684C | Relays for regulating devices | |
| DE497165C | Control device provided with several sensors | |
| DE501695C | Hot water remote heating system with hot water circulation and heat meter | |
| DE625001C | Pump hot water heating | |
| US1535765A | Device for utilizing the heat contained in the fuel residues of furnaces | |
| DE494743C | Pressure regulator with a stretchable metal hose as a pressure load cell | |
| DE519196C | relay |