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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US2222164


Patent:US 2222164
Title:Calculating Machine
Date:19.11.1940
Place:
Country:USA
Person:Avery, Harold (P)
Company:Marchant (P)
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2222164 (espacenet),  US2222164 (uspto)


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Aus der Patentschrift US2222164