| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents Granted on 1841-12-23 | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 2,400 | Dec. 23, 1841 | T.J. Wells | Improvement in the manner of constructing and of propelling steamboats, denominated the "buoyant spiral propeller" | steamboats | |