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| Patents for John McDowall & Sons | |||||
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| Picture | Number | Date | Patentee | Title | |
 | GB-182,705,502 | Jun. 01, 1827 | M. Muir | Certain Machinery for Preparing Boards for Flooring and Other Similar Purposes | |
 | GB-186,801,337 | Apr. 23, 1868 | J. Casson | Improvement in machinery for sawing wood | |
 | 87,908 | Mar. 16, 1869 | J. Casson | Improvement in sawing-machine | |