| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 9 | |
| #2 | Switzerland | 8 | |
| #3 | Austria | 4 | |
| #4 | Belgium | 3 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Domestic plumbing installations | |
| #2 | Roof coverings | |
| #3 | Sewers | |
| #4 | Foundations and excavations |
| # | Name | Total Patents |
|---|---|---|
| #1 | Loeffler Walther | 17 |
| #2 | Walther Loeffler | 8 |
| #3 | Loeffler Johanna | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1609124A1 | Cover with grate for sinks and water inlets stored in a storage frame | |
| DE1609121A1 | Roof drainage device for flat roofs with roof skin | |
| DE1609119A1 | Cover with grate for sinks and water inlets or with a closed lid for pits | |
| DE1609114A1 | Roof drain with sleeve pipe for condensation drainage |