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| Patents for William L. May | |||||
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| Number | Date | Patentee | Title | Type | |
| 184,537 | Nov. 21, 1876 | W.L. May | Improvement in tape-line lumber-measures | tape measures | |
| 602,524 | Apr. 19, 1898 | G.M. Rockey, C.H. Strain | Combination Tool | measurement gauges | |