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| Patents for William H. Mayo | |||||
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| Number | Date | Patentee | Title | Type | |
| 128,970 | Jul. 16, 1872 | W.H. Mayo | Improvement in machine for making excelsior | excelsior machines | |
| 136,529 | Mar. 04, 1873 | W.H. Mayo | Improvement in excelsior-machines | excelsior machines | |