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| All Patents in class 138/147 | |||||
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| Number | Date | Patentee | Title | Type | |
| 112,018 | Feb. 21, 1871 | N.T. Coffin | Improvement in pumps | ||
| 149,263 | Mar. 31, 1874 | A.P. Stephens | Improvement in sheet-metal cement-lined pipes | pipes | |