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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US3214094


Patent:US 3214094
Title:Calculating Machine
Date:26.10.1965
Place:
Country:USA
Person:Ellerbeck, Grant Clawson (P)
Company:Friden (P)
Internal Links:chain discount mechanism
Keywords:
Link to the patent office:
(without guarantee)
 US3214094 (espacenet),  US3214094 (uspto)


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