| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machines | |
| #3 | Electrical machinery and energy | |
| #4 | Environmental technology | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Pumps | |
| #2 | Unspecified technologies | |
| #3 | Electric switches | |
| #4 | Water treatment | |
| #5 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | John Astrom | 6 |
| #2 | Tannehill Vernon L | 3 |
| #3 | Astrom John I | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US1767100A | Pulsation eliminator for pumps | |
| US1775412A | Fluid-treating apparatus | |
| US1723635A | Automatic pressure-controlled switch | |
| US1646847A | Automatic pressure-control apparatus | |
| US1656896A | Water-softening device | |
| US1671565A | Pump | |
| US1535643A | Pump | |
| US1502651A | Mounting for deep-well-pump heads | |
| US1449028A | Deep-well-pump head | |
| US1328474A | Pump | |
| US1349253A | Valve |