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| Patents for Erastus E. Pierce | |||||
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| Number | Date | Patentee | Title | Type | |
| 241,562 | May 17, 1881 | E.E. Pierce | Machine for Making Horseshoe Nails | horseshoe nail making machines | |
| 535,815 | Mar. 19, 1895 | E.E. Pierce, W.L. Crouch | Gas Engine | gas and gasoline engines | |
| 872,048 | Nov. 26, 1907 | W. Broad | Single Crank Screwdriver | screwdriver mechanisms | |