| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 13 | |
| #2 | France | 6 | |
| #3 | Austria | 4 | |
| #4 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Control | |
| #3 | Thermal processes | |
| #4 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Systems controlling non-electric variables | |
| #3 | Water treatment | |
| #4 | Preheating for stem generation | |
| #5 | Steam generation | |
| #6 | Steam traps | |
| #7 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Edler Eduard | 2 |
| Publication | Filing date | Title |
|---|---|---|
| FR777210A | Automatic regulator expansion valve | |
| DE561679C | Return for control devices | |
| GB171082A | High pressure slide stop valve with parallel steam-tight surfaces | |
| GB146362A | High pressure slide stop valve with parallel steam-tight surfaces |