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| Patents for Manzer Wilson Downie | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-141,815 | Jul. 23, 1912 | M.W. Downie | Combination track gauge and recorder | ||
| 1,066,188 | Jul. 01, 1913 | M.W. Downie | Combination track gauge and recorder | ||