| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents Granted on 1840-04-?? | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 1,553 | Apr. 15, 1840 | W. Field | Manner of Manufacturing Screw-Augers | making drills and augers | |
| 1,554 | Apr. 15, 1840 | R. Porter | Cheese-press | cheese press | |