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| Patents for Mirtillow R. Clapp | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 204,885 | Jun. 18, 1878 | M.R. Clapp | Improvement in boilers for steam fire-engines | |
 | 358,430 | Mar. 01, 1887 | M.R. Clapp | Coiled-tube boiler | |