US1174205A
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Device for promoting digital dexterity.
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US1148663A
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Type-writing machine.
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US1167128A
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Combined type-writing and computing machine.
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US1121808A
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Combined type-writing and computing machine.
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US1152945A
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Type-writing machine.
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US1152944A
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Type-writing machine.
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US1150164A
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Type-writing machine.
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US1152928A
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Type-writing machine.
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US1302464A
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Computing attachment for type-writers.
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US1090444A
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Clutch.
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US1163616A
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Computing attachment for type-writers.
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US1165325A
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Tabulating and computing attachment for type-writer machines.
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US1093298A
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Type-writing machine.
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US1105774A
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Variable-throw device.
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US1110448A
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Type-writing attachment for adding-machines.
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US1146371A
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Computing-machine.
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US1071273A
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Combined type-writing and computing machine.
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US1055480A
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Type-writing machine.
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US1063878A
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Stand for type-writing machines.
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US1157884A
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Combined type-writing and computing machine.
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