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All Patents in class 73/507
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	138,420	Apr. 29, 1873	O. Marland	Marine Steam-Engine Governors
	1,900,050	Mar. 07, 1933	W. Ernst	Hydraulic Press Platen Travel Equalizer
	2,412,957	Dec. 24, 1946	F.A. Barnes	Machine tool control

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