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| Patents for C. G. C. Simpson | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-537 | Aug. 03, 1870 | C.G. Simpson | Improvements on railway car wheel | railroad car wheels | |
| 161,516 | Mar. 30, 1875 | W. Johnstone | Improvement in Bench Planes | plane cutter adjustments | |