| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 122/397 | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 274,048 | Mar. 13, 1883 | E.R. Stilwell | Feed-water heater and purifier | feedwater apparatus | |
| 434,656 | Aug. 19, 1890 | A. Cunningham | Steam Boiler | stationary boilers | |