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All Patents in class 235/1R
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	25,423	Sep. 13, 1859	A. Lafever	Board Measure
	1,718,052	Jun. 18, 1929	W.C. Lineaweaver	Measuring Device
	3,180,573	Apr. 27, 1965	R.H. Damon, Jr., J.C. Merrill, B.C. Merrill	Recorder Mechanism Control Means

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