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| All Patents in class 144/220 | |||||
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| Number | Date | Patentee | Title | Type | |
| 383,589 | May 29, 1888 | W.H. Parry | Groove-cutting tool | cutters | |
| 529,114 | Nov. 13, 1894 | J. Ettinger | Rotary cutter | cutters | |
| 749,458 | Jan. 12, 1904 | H.S. Spencer | Dovetailing-machine | dovetailing machines | |
| 2,839,107 | Jun. 17, 1958 | A.N. Emmons | Combination straight and bevel cutter | handheld routers | |