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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US591332


Patent:US 591332
Title:Mechanical calculator
Date:1989
Place:Knoxville, TN
Country:USA
Person:Robert Duncan
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US591332 (espacenet),  US591332 (uspto)


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