| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 21 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Agriculture | |
| #3 | Electrical machinery and energy | |
| #4 | Machines | |
| #5 | Transport | |
| #6 | Weapons |
| # | Technology | |
|---|---|---|
| #1 | Non-positive-displacement pumps | |
| #2 | Harvesting | |
| #3 | Treating harvested food | |
| #4 | Dynamo-electric machines | |
| #5 | Milling | |
| #6 | Pumps | |
| #7 | Crop agriculture | |
| #8 | Planting | |
| #9 | Hand carts | |
| #10 | Explosiveness missiles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Zeller Adolf | 8 |
| Publication | Filing date | Title |
|---|---|---|
| DE556579C | Self-priming centrifugal pump | |
| DE398895C | Haeckselmaschine | |
| DE499220C | Self-priming centrifugal pump |