| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 20 | |
| #2 | United Kingdom | 3 | |
| #3 | France | 1 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Mechanical elements | |
| #3 | Thermal processes | |
| #4 | Control | |
| #5 | Machine tools | |
| #6 | Engines, pumps and turbines | |
| #7 | Machines | |
| #8 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Steam traps | |
| #2 | Separation | |
| #3 | Steam generation | |
| #4 | Coin-freed | |
| #5 | Kitchen equipment | |
| #6 | Unspecified technologies | |
| #7 | Punching metal | |
| #8 | Pumps |
| # | Name | Total Patents |
|---|---|---|
| #1 | Graefe Paul | 6 |
| #2 | Paul Graefe | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB712949A | Improvements in or relating to steam traps | |
| US2702045A | Steam water drain with a float controlled horizontal shutoff element | |
| GB202861A | Improvements in apparatus for separating liquids from compressed-air, gas or vapour currents | |
| GB182201A | Improvements in and relating to apparatus for purifying air, gas or vapour |