| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents Granted on 1847-02-20 | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 4,972 | Feb. 20, 1847 | W.H. Baker, H.R. Worthington | Apparatus for gaging the height of water in boilers | steam apparatus | |