| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 8 | |
| #2 | Switzerland | 5 | |
| #3 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Civil engineering | |
| #3 | Medical technology | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Water treatment | |
| #2 | Climate change mitigation in wastewater treatment | |
| #3 | Dredging | |
| #4 | Foundations and excavations | |
| #5 | Pipes | |
| #6 | Diagnosis and surgery |
| # | Name | Total Patents |
|---|---|---|
| #1 | Stengel Erwin | 8 |
| #2 | Erwin Stengel | 5 |
| #3 | Guenther Klotz | 1 |
| #4 | Klotz Guenther | 1 |
| Publication | Filing date | Title |
|---|---|---|
| ES201348A3 | An environment mold for trenches and excavations, especially intended to have conductions, pipes and similar (Machine-translation by Google Translate, not legally binding) | |
| DE937520C | Wastewater distributor for purification plants with baffles in front of the inlet pipes | |
| DE921799C | Wastewater distributor for purification plants with the inlet pipes on the basin-side baffles | |
| DE920179C | Wastewater distributors in treatment plants |