| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 13 | |
| #2 | United States | 8 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Environmental technology | |
| #3 | Engines, pumps and turbines | |
| #4 | Electrical machinery and energy | |
| #5 | Thermal processes | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Water treatment | |
| #3 | Pumps | |
| #4 | Venting or aerating devices | |
| #5 | Fluid heaters | |
| #6 | Unspecified technologies | |
| #7 | Electric motor controls |
| # | Name | Total Patents |
|---|---|---|
| #1 | Tannehill Vernon L | 12 |
| #2 | Astrom John | 7 |
| #3 | John Astrom | 1 |
| #4 | Astrom John I | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1854773A | Pump | |
| US1886135A | Water heater | |
| US1713105A | Automatic and semiautomatic water softener | |
| US1783634A | Control mechanism for electric motors | |
| US1732702A | Valve-control mechanism for water softeners | |
| US1626055A | Water softener | |
| US1412596A | Water-pumping system | |
| US1366151A | Check-valve | |
| CA305895A | Pulsation eliminator for pumps | |
| CA257247A | Pump | |
| CA294948A | Fluid treating apparatus | |
| CA281300A | Switch mechanism | |
| CA277030A | Water softening device | |
| CA235642A | Deep well pump head | |
| CA202806A | Pump | |
| CA285533A | Motor control mechanism | |
| CA277872A | Water softener | |
| CA257248A | Pump valve | |
| CA212877A | Check valve | |
| CA273207A | Water softener |