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| Patents for Effie I. Croft | |||||
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| Number | Date | Patentee | Title | Type | |
| 425,208 | Apr. 08, 1890 | G. Carlyle | Calipers | calipers | |
| 509,444 | Nov. 28, 1893 | C.H. Norton | Milling-machine | milling machines | |
| 519,199 | May 01, 1894 | J.W. Oliver | Trimming-machine | miter machines | |