patent model, Page induction coil, US #76654

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patent model, Page induction coil, US #76654

museum
National Museum of American History
objectType
Patents
Date
約1868年
Creator
Charles G. Page
overall: 7 in x 8 3/4 in x 4 3/4 in; 17.78 cm x 22.225 cm x 12.065 cm