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| All Patents in class 408/74 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,501,601 | Mar. 21, 1950 | R.R. Finn | Automatic Die | taps and dies | |
| 2,746,066 | May 22, 1956 | P.A. White, R.R. Finn | Collapsible Threading Die for Selectively Cutting Straight or Taper Threads | taps and dies | |
| 2,841,053 | Jul. 01, 1958 | H. Horlacher | Tracer Controlled Angular Cutter | milling machine cutters | |