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| Patents for William I. Curtis | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,359,033 | Dec. 19, 1967 | W.I. Curtis | Fluid powered tongs | hydraulic apparatus | |
| 3,831,779 | Aug. 27, 1974 | W.I. Curtis | Bar sorter | metalworking machine mechanisms | |