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All Patents in class 409/327 | |||||
Number | Date | Patentee | Title | Type | |
2,077,730 | Apr. 20, 1937 | W.F. Zimmermann | Balanced Helicoidal Change Speed Drive for Shapers | metal shapers | |
2,454,490 | Nov. 23, 1948 | V.G. Evans, J.R. Tackett | Machine Tool Shaper Attachment | milling machine accessories |