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| Patents for William G. Caldwell | |||||
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| Number | Date | Patentee | Title | Type | |
| 141,852 | Aug. 19, 1873 | W.G. Caldwell | Improvement in machines for edging lumber | circular sawmills | |
| 160,003 | Feb. 23, 1875 | W.G. Caldwell | Improvement in relishing-machines | wood shapers | |