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Patents for Edward B. Sperry | |||||
Number | Date | Patentee | Title | Type | |
196,188 | Oct. 16, 1877 | W.E. Brock | Improvement in Combined Bevel, Square, Compass, Calipers, &c. | combination tools | |
197,171 | Nov. 13, 1877 | P. Pryibil | Improvement in shaft-hangers | industrial machine shaft hangers | |
198,633 | Dec. 25, 1877 | C.W. Le Count | Expanding Mandrels | mandrels and arbors |