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| Patents for M. W. Frothingham | |||||
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| Number | Date | Patentee | Title | Type | |
| 155,222 | Sep. 22, 1874 | G.H. Cavanagh | Improvement in pile-cutters | circular saws | |
| 156,204 | Oct. 27, 1874 | G.H. Cavanagh | Improvement in pile-cutters | circular saws | |
| 160,043 | Feb. 23, 1875 | E.J. Wescott | Improvement in jig-saws | scrollsaws | |
| 421,832 | Feb. 18, 1890 | A.T. Stearns | Cutter Head | panel raising machines | |