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| Patents for J. L. Coombs | |||||
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| Number | Date | Patentee | Title | Type | |
| 294,724 | Mar. 04, 1884 | H.P. Cope | Metallic Router Plane | router planes | |
| 435,311 | Aug. 26, 1890 | C.O. Lambert | Gage | micrometer depth gauges | |