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Patents for Frank Ackerman
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,396,391	Nov. 08, 1921	F. Ackerman, C.W. Frees	Power-operated compressor
	1,435,574	Nov. 14, 1922	F. Ackerman	Lubricating System for Piston Engines
	1,576,702	Mar. 16, 1926	F. Ackerman	Electrically Operated Bridge Crane

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