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| Patents for Charles F. Richardson | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 306,429 | Oct. 14, 1884 | H.M. Rich | Inclinometer | |
 | 368,308 | Aug. 16, 1887 | C.F. Richardson | Surveyor's transit | |
 | 570,056 | Oct. 27, 1896 | C.F. Richardson | Spirit Level | |