| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 17 | |
| #2 | Canada | 13 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Chemical engineering | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Water treatment | |
| #2 | Unspecified technologies | |
| #3 | Pumps | |
| #4 | Separation | |
| #5 | Lubricating |
| # | Name | Total Patents |
|---|---|---|
| #1 | Johnson Oscar W | 10 |
| #2 | Johnson Oscar Wilfred | 5 |
| #3 | Donald Griswold | 3 |
| #4 | Clark Thomas Byron | 3 |
| #5 | Russell Sweeney Orland | 3 |
| #6 | Harwood Stanley G | 3 |
| #7 | Sweeney Orland Russell | 2 |
| #8 | Colvin Robert Harry | 1 |
| #9 | Clark Thomas B | 1 |
| #10 | Horwood Stanley Gordon | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1723041A | Deep-well pump | |
| US1846419A | Automatic water softener | |
| US1671699A | Water softener | |
| US1873594A | Water softener | |
| US1751638A | Strainer nozzle | |
| US1664930A | Sanitary pump | |
| US1846418A | Automatic water softener | |
| US1692939A | Water softener | |
| US1628541A | Water softener | |
| US1736890A | Water-softener brine tank | |
| US1698743A | Semiautomatic water softener | |
| US1654172A | Water softener | |
| US1692776A | Valve-operating mechanism | |
| US1557117A | Base-exchange water softener | |
| US1639091A | Closure operator | |
| US1649593A | Deep-well pump | |
| US1638160A | Lubrication means for pumps and the like | |
| CA319707A | Semi-automatic water softener | |
| CA257863A | Water softener | |
| CA283801A | Water softener |