| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 11 | |
| #2 | United Kingdom | 5 | |
| #3 | France | 4 | |
| #4 | Netherlands | 2 | |
| #5 | Luxembourg | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Pistons and sealings | |
| #3 | Steam traps | |
| #4 | Electrography |
| # | Name | Total Patents |
|---|---|---|
| #1 | Werner Foeller Dipl-Ing | 4 |
| #2 | Bliek Hendrik De | 4 |
| #3 | Hartmann Ewald | 4 |
| #4 | Egelhofer Rudolf | 3 |
| #5 | De Bliek Hendrik | 2 |
| #6 | Mertz Francois | 1 |
| #7 | Foeller Dipl-Ing Werner | 1 |
| #8 | Ulrich Domm Dr | 1 |
| #9 | Bliek H | 1 |
| #10 | Luescher Hermann | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2839804A1 | DIAPHRAGM VALVE | |
| DE2629621A1 | DIAPHRAGM VALVE | |
| DE2325814A1 | DIAPHRAGM, IN PARTICULAR DIAPHRAGM VALVES | |
| GB1372223A | Flexible diaphragm | |
| GB1350136A | Diaphragm valve | |
| DE2000591A1 | Float drain with relieved slide | |
| DE1800252A1 | Steam trap with two expansion bodies and with a slide valve |