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All Patents in class 91/235
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	284,173	Sep. 04, 1883	B. Brazelle	Direct-acting engine
	1,065,339	Jun. 24, 1913	B. Brazelle	Single-acting engine
	2,561,577	Jul. 24, 1951	R.G. Knudsen	Pneumatic Impact Pullers and the Like

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