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| Patents for L. H. Hamilton | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,652 | Jun. 27, 1840 | J. Hamilton | Pit-sawing and slitting machine for sawing logs into lumber and boards | reciprocating sawmills | |
| 1,093,820 | Apr. 21, 1914 | C.H. Beach | Vacuum-cleaner | vacuum cleaners | |