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09.01.1923 Mays James F Mays Accounting Machine Compan : Calculating Machine
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26.01.1923 Ivan Engstrom ACME Appliance Comp. : Combined adding, listing, and check writing machine
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20.03.1923 William Moeller Wales Adding Machine Company : Calculating Machine
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23.10.1923 Sidney B. Lamb : Time calculator
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06.11.1923 T. E. Cherry : Adding Machine
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06.11.1923 H. Foley : Calculating Device
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13.11.1923 Ludwig Beckenbauer : Adjusting mechanism for calculating machines
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13.11.1923 E. F. Britten, Jr. : Calculating Machine
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04.12.1923 Friden, Carl Mauritz Fredrick (P) : Calculating machine
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11.12.1923 De Simone, Michele Guglielmo New York Calculating Machine Company : Denominator and Adding Machine
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11.12.1923 De Giglio, Gaetano : Calculating machine
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25.08.1923 F. Leitner : Adding Machine
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