| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 38 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Chemical engineering | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Sewers | |
| #3 | Climate change adaptation technologies | |
| #4 | Water treatment | |
| #5 | Climate change mitigation in wastewater treatment |
| # | Name | Total Patents |
|---|---|---|
| #1 | Csepai Ludwig Dipl Ing | 3 |
| #2 | Spiegel Herbert Ing | 2 |
| #3 | Schmid Wilhelm Dipl Ing | 2 |
| #4 | Vesely Franz Ing | 2 |
| #5 | Frotzler Franz Dipl Ing | 1 |
| #6 | Hesel Heinz | 1 |
| #7 | Seltenhammer Ludwig Dipl Ing D | 1 |
| #8 | Lengyel Werner Dipl Ing | 1 |
| #9 | Hromada Johann Ing | 1 |
| #10 | Beckel Friedrich Dipl Ing | 1 |