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Patents for Rahn Granite Surface Plate Co.
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
2,601,630Jun. 24, 1952R.J. Rahn, I.J. RahnAngle block and method of manufacturemeasuring tools
2,947,083Aug. 02, 1960R.J. RahnSurface plate calibrationmeasuring tools
3,159,469Dec. 01, 1964R.J. Rahn, I.J. RahnGradient temperature normalizer for surface plates or blocksmeasuring tools
3,739,150Jun. 12, 1973R.J. RahnGranite Surface Plate With Controlled Heatsurface plates
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