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Die große Enzyklopädie des mechanischen Rechnens

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Search results for: Eckel, Arthur


 
  • Patent:US2426601 02.09.1947 Eckel, Arthur (P), Louise Wickersham Pickett, Myrtle Scott Eckel : Calculator and decimal point locator
  • Patent:US2466883 12.04.1949 Eckel, Arthur (P), Louise Wickersham Pickett, Myrtle Scott Eckel : Calculator and decimal point locator

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