| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 10 | |
| #2 | EPO (European Patent Office) | 1 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Civil engineering | |
| #3 | Control |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Compressed gas holders | |
| #3 | Fire-fighting | |
| #4 | Systems controlling non-electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Olma Ernst | 5 |
| #2 | Wichterich Hans | 3 |
| Publication | Filing date | Title |
|---|---|---|
| DE3733050A1 | Shut-off valve | |
| DE3722690A1 | Shut-off valve for pressure vessels | |
| DE3722689A1 | Shut-off valve | |
| DE3229332A1 | Pressure relief device | |
| DE3222041A1 | Residual pressure valve | |
| DE3115136A1 | Combined shut-off and relief valve | |
| DE3102325A1 | Valve arrangement for portable apparatus, in particular hand-held fire extinguishers and the like | |
| DE3102261A1 | Shut-off valve arrangement for hand-held fire extinguishers or other pressurised gas containers or the like | |
| DE3048732A1 | VALVE ARRANGEMENT | |
| DE2931501A1 | Gas pressure vessel stop valve - comprises plug released by piston subjected to internal gas pressure |