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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US2733011


Patent:US 2733011
Title:Clearing
Date:31.01.1956
Place:Hayward, CA
Country:USA
Person:Elwood A. Davis
Company:Friden (P) Calculating Machine Co., Inc.
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Keywords:
Link to the patent office:
(without guarantee)
 US2733011 (espacenet),  US2733011 (uspto)


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