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| All Patents in class 414/591 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,135,397 | Jun. 02, 1964 | A.R. Kull | Die Lifter | forging apparatus and accessories | |
| 4,164,296 | Aug. 14, 1979 | C.I. Trees | Apparatus for Transferring and Rotating Articles | conveyors and hoppers | |