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