All Patents in class 222/161


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All Patents in class 222/161
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
1,241,212	Sep. 25, 1917	C.L. Heisler	Powder Blending Apparatus	mixing machines
2,362,234	Nov. 07, 1944	W.H. Barger	Device for Marking Powder Lines	clapboard markers