| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 23 |
| # | Industry | |
|---|---|---|
| #1 | Agriculture | |
| #2 | Engines, pumps and turbines | |
| #3 | Mechanical elements | |
| #4 | Transport | |
| #5 | Chemical engineering | |
| #6 | Machine tools | |
| #7 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Planting | |
| #2 | Pumps | |
| #3 | Pistons and sealings | |
| #4 | Load transportation vehicles | |
| #5 | Treating harvested food | |
| #6 | Sawing | |
| #7 | Non-positive-displacement pumps | |
| #8 | Sewers | |
| #9 | Drying solid materials by removing liquid | |
| #10 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Flender Rudolf | 6 |
| Publication | Filing date | Title |
|---|---|---|
| DE619222C | Emptying device for a membrane pump with a standing membrane | |
| DE666760C | Device for the self-draining of diaphragm pumps |