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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US2825505


Patent:US 2825505
Title:Calculating Device
Date:04.03.1958
Place:
Country:USA
Person:G. L. Hall
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2825505 (espacenet),  US2825505 (uspto)


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