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| Patents for Ida M. Warren | |||||
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| Number | Date | Patentee | Title | Type | |
| 495,221 | Apr. 11, 1893 | N.T. Greene | Steam-piston packing | steam engine packing | |
| 511,607 | Dec. 26, 1893 | F.J. Gay | Cutter for Gear Wheels | milling machine cutters | |