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| Patents for Robert L. Harris | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 7,432 | Jun. 11, 1850 | J.A. Woodbury | Match Plane with Gouge Cutter | |
 | 26,152 | Nov. 22, 1859 | E.G. Allen | Combination steam-gage | |
 | 26,871 | Jan. 17, 1860 | E.G. Allen | Steam-gage | |