| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 16 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machines | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Non-positive-displacement pumps | |
| #2 | Unspecified technologies | |
| #3 | Venting or aerating devices | |
| #4 | Lubricating | |
| #5 | Pistons and sealings | |
| #6 | Pumps | |
| #7 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Otto Haentjens | 16 |
| #2 | Haentjens Walter D | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US2890659A | Slurry pump | |
| US2743120A | Stuffing box | |
| US2625110A | Pump for vertical movement of liquids | |
| US2057570A | Self-priming centrifugal pump | |
| US1791408A | Priming system for centrifugal pumps | |
| US1782345A | Centrifugal-pump-priming system | |
| US1755000A | Priming means for centrifugal pumps | |
| US1816775A | Multistage centrifugal pump | |
| US1793396A | Diaphragm valve | |
| US1745257A | Pump system | |
| US1599231A | Pump system | |
| US1573706A | Lubrication system | |
| US1513705A | Pump system | |
| US1481199A | Pump system | |
| US1445507A | Pump system | |
| US1489122A | Pump |