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| Patents Granted on 1856-05-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 14,909 | May 20, 1856 | B. Gardner | Method of operating sawmill blocks | sawmills | |
| 14,914 | May 20, 1856 | E. Hedley | Shingle-machine | shingle machines | |
| 14,930 | May 20, 1856 | J. Robingson | Method of hanging reciprocating saws | reciprocating sawmills | |
| 14,941 | May 20, 1856 | M. Roberts | Lathe attachment for turning irregular forms | pattern lathes | |