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| Patents for Thomas Ritchie | |||||
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| Picture | Number | Date | Patentee | Title | |
| XC-612 | Mar. 20, 1856 | T. Ritchie | Improvement in the draft applied to reaping, mowing or other machines | ||
 | 111,953 | Feb. 21, 1871 | J. Lough | Improvement in saw-tooth swages | |