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| Patents for William W. Laidlaw | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-650 | Oct. 10, 1870 | D. Spiers | Improvements on nails, spikes, and bolts | ||
| CA-17,602 | Sep. 10, 1883 | W.W. Laidlaw | Buzz or trueing-up planers | jointers | |