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| Patents for J. Erastus Lester | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 100,440 | Mar. 01, 1870 | A.T. Perrine | Improvement in auger for boring square holes | |
 | 105,250 | Jul. 12, 1870 | J.F. Rider, E.P. Brownell | Improvement in spool-machines | |
 | 113,798 | Apr. 18, 1871 | J.F. Rider, E.P. Brownell | Machine for boring spools | |