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Patents for Michael H. Dempsey
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
779,848	Jan. 10, 1905	G. Hart	Grinding-wheel	grinding wheels
825,460	Jul. 10, 1906	G. Hart	Grinding-wheel	grinding wheels
945,526	Jan. 04, 1910	G. Hart	Grinding-wheel	grinding wheels

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