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Patents for Edward H. Hall
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
1,947,892Feb. 20, 1934E.H. Hall, H.C. WalshPower press controlpunch presses
2,051,116Aug. 18, 1936H.C. Walsh, E.H. HallPower press driving mechanismpunch presses
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