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| Patents for Perley M. Cummings | |||||
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| Number | Date | Patentee | Title | Type | |
| 110,119 | Dec. 13, 1870 | P.M. Cummings | Improvement in head-blocks | sawmill headblocks | |
| 127,465 | Jun. 04, 1872 | P.M. Cummings | Improvement in saw-mill head-blocks | sawmill headblocks | |
| 144,388 | Nov. 11, 1873 | P.M. Cummings | Improvement in head-blocks | sawmill headblocks | |