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| Patents for John Blackmar | |||||
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| Number | Date | Patentee | Title | Type | |
| 8,345X | Aug. 07, 1834 | J. Blackmar | Constructing weavers' harness | weaver | |
| 61 | Oct. 20, 1836 | J. Blackmar | Heddle | yarn reels | |
| 64 | Oct. 20, 1836 | J. Blackmar | Construction of Weavers' Harness | cloth weaving machines | |