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All Patents in class 37/97
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
828,208	Aug. 07, 1906	J.B. Hill	Ditching-Machine	ditching machines
885,343	Apr. 21, 1908	J.B. Hill	Digging-Machine	ditching machines
941,145	Nov. 23, 1909	J.B. Hill	Ditching-Machine	ditching machines

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