| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 84 | |
| #2 | France | 8 | |
| #3 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Chemical engineering | |
| #3 | Mechanical elements | |
| #4 | Environmental technology | |
| #5 | Materials and metallurgy |
| # | Technology | |
|---|---|---|
| #1 | Steam generation | |
| #2 | Cleaning heat-exchanger internal surfaces | |
| #3 | Separation | |
| #4 | Domestic heating systems | |
| #5 | Preheating for stem generation | |
| #6 | Water treatment | |
| #7 | Venting or aerating devices | |
| #8 | Steam traps | |
| #9 | Casting metal | |
| #10 | Superheating of steam |
| # | Name | Total Patents |
|---|---|---|
| #1 | Huelsmeyer Christian | 25 |
| Publication | Filing date | Title |
|---|---|---|
| GB245588A | Improvements relating to the preheating and purifying of boiler feed-water | |
| GB157790A | Process of and device for separating air and gases from liquids, particularly feed water for boilers |