| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 6 | |
| #2 | Switzerland | 2 | |
| #3 | Austria | 1 | |
| #4 | Denmark | 1 | |
| #5 | United Kingdom | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Measurement | |
| #3 | Thermal processes | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Steam traps | |
| #3 | Analysing materials | |
| #4 | Steam generation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Graefe Paul | 8 |
| #2 | Paul Graefe | 3 |
| #3 | Graefe Paul Frankfurt | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1907396A1 | Separation of liquids from rapidly flowing - gases vapours etc | |
| US1072941A | Apparatus for separating out liquids from vapors and gases. | |
| GB191215353A | Improvements in Devices for Separating Liquid Particles from Gases and Vapours. |