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| All Patents in class 285/371 | |||||
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| Number | Date | Patentee | Title | Type | |
| 94,146 | Aug. 24, 1869 | M. Stephens | Improvement in joints for cement-pipes | pipes | |
| RE4,980 | Jul. 16, 1872 | M. Stephens | Improvement in joints for cement-pipes | pipes | |