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| Patents for J. N. Macdonald & Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 965,722 | Jul. 26, 1910 | J.N. Macdonald | Chain Repairing Implement | |
 | 1,041,826 | Oct. 22, 1912 | J.N. Macdonald | Chain Repair Tool | |
 | RE13,957 | Aug. 03, 1915 | J.N. Macdonald | Chain Repairing Implement | |