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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US3446433


Patent:US 3446433
Title:Pushbutton Calculator
Date:27.05.1969
Place:
Country:USA
Person:Tibbetts, Ernest (P)
Company:Burroughs (P)
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US3446433 (espacenet),  US3446433 (uspto)


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Aus der Patentschrift US3446433