| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for F. L. Campbell | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 411,681 | Sep. 24, 1889 | W.H. Ridgway | Crane | jib cranes | |
| 415,561 | Nov. 19, 1889 | W.H. Ridgway | Water-wheel | turbine water wheels | |
| 453,449 | Jun. 02, 1891 | W.H. Ridgway | Jet or impact water-wheel | turbine water wheels | |