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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US2451784


Patent:US 2451784
Title:Calculator mechanism
Date:19.10.1948
Place:
Country:USA
Person:Tellander Jr Frederic, Victor O Lothman
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2451784 (espacenet),  US2451784 (uspto)


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Aus der Patentschrift US2451784