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| Patents for M. Robertson | |||||
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| Number | Date | Patentee | Title | Type | |
| 336,631 | Feb. 23, 1886 | C. Esplin | Nose-guard for saw-mill head-blocks | sawmill headblocks | |
| 386,831 | Jul. 31, 1888 | J. Kelly | Work-bench | workbenches | |
| 1,058,441 | Apr. 08, 1913 | W.D. Kelly | Woodworking-machine | dovetailing machines | |