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| Patents for Eagle Square Mfg. Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 98,710 | Jan. 11, 1870 | E.H. Robinson | Improvement in ruling-device | |
 | 1,107,516 | Aug. 18, 1914 | H.E. Harris | Separable Square | |