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| Patents Granted on 1861-03-12 | |||||
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| Number | Date | Patentee | Title | Type | |
| 31,656 | Mar. 12, 1861 | J. Creager | Machine for turning irregular forms | pattern lathes | |
| 31,658 | Mar. 12, 1861 | R. Daniels, G.P. Cobb | Beehive | ||
| 31,660 | Mar. 12, 1861 | L. Dodge | Making axes | tool making machines | |
| 31,678 | Mar. 12, 1861 | A.T. Serrell | Feeding-roller for rotary planing | wood planers | |
| 31,693 | Mar. 12, 1861 | G.B. Phillips | Improvements in Wagon-Wrenches | axle nut wrenches | |
| 31,694 | Mar. 12, 1861 | L. Stevens, A. Wyckoff | Pump-Log Hollow Auger | hollow bits | |