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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US3696994


Patent:US 3696994
Title:Calculating Mechanism For Ten Keys - Four Species - Calculating Machines
Date:10.10.1972
Place:
Country:USA
Person:Burkhardt, Gottfried (P)
Company:Diehl (P)
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US3696994 (espacenet),  US3696994 (uspto)


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Aus der Patentschrift US3696994