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| Patents for W. H. Humphrey | |||||
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| Number | Date | Patentee | Title | Type | |
| 322,636 | Jul. 21, 1885 | E. Pement | Lathe-chuck | metal lathe chucks | |
| 418,419 | Dec. 31, 1889 | L.H. Nash | Igniter for Gas Engines | ignition systems | |