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| Patents for Emmet A. Thomas | |||||
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| Number | Date | Patentee | Title | Type | |
| 736,572 | Aug. 18, 1903 | W.A. Barker | Electric hoist | hoists, winches, come-alongs | |
| 787,609 | Apr. 18, 1905 | W.A. Barker | Hoisting-machine | hoists, winches, come-alongs | |
| CA-111,141 | Mar. 31, 1908 | W.A. Barker | Friction lock | traction engine steering apparatus | |