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All Patents in class 74/89.42
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	525,780	Sep. 11, 1894	J. Boynton	Mechanism for Taking Up Lost Motion
	1,955,954	Apr. 24, 1934	L.A. Dumser	Back-lash compensator
	2,320,353	Jun. 01, 1943	M.E. Martellotti, H. Ernst	Power Transmission Mechanism
	3,141,349	Jul. 21, 1964	D.I. McDonald	Ball Bearing Screw and Nut Mechanism
	4,487,087	Dec. 11, 1984	R. Johnstone	Ball Nut Having Adjustable Preload

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