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All Patents in class 250/230 | |||||
Number | Date | Patentee | Title | Type | |
2,720,810 | Oct. 18, 1955 | J.A. Senn | Measuring Instrument | milling machine accessories | |
2,832,894 | Apr. 29, 1958 | R.H. Eisengrein, R.J. W, D.A. Straznickas | Automatic machine |