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| Patents for A. H. Butler | |||||
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| Number | Date | Patentee | Title | Type | |
| 705,867 | Jul. 29, 1902 | H.H. Richardson | Combination Square and Level | bevel squares | |
| 960,705 | Jun. 07, 1910 | H.M. Reynolds | Reinforced lathe-chuck | metal lathe chucks | |