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| Patents for Robert Martin | |||||
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| Number | Date | Patentee | Title | Type | |
| 74,697 | Feb. 18, 1868 | W. Kenyon, Jr. | Improvement in Pipe-Tongs | pipe tongs | |
| 320,537 | Jun. 23, 1885 | B.B. Butt | Spirit Level | metallic levels | |