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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US2232086


Patent:US 2232086
Title:Mechanical integrator
Date:18.02.1941
Place:Appleton, WI
Country:USA
Person:J.A. Van den Akker
Company:Institute of Paper Chemistry
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Keywords:
Link to the patent office:
(without guarantee)
 US2232086 (espacenet),  US2232086 (uspto)


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