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| Patents for Bertha M. Ballard | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 667,595 | Feb. 05, 1901 | F.W. Spacke | Automatic Stop for Governors | |
 | 683,170 | Sep. 24, 1901 | H.C. Clay | Separator Tooth | |
| 696,305 | Mar. 25, 1902 | T. Bemis | Pneumatic-despatch-tube system | ||