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| All Patents in class 166/230 | |||||
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| Number | Date | Patentee | Title | Type | |
| 90,787 | Jun. 01, 1869 | W.P. Smith, L.M. Rumsey | Improved drill for rock and earth with attached tube | ||
| 156,488 | Nov. 03, 1874 | S. Males | Improvement in strainers | ||