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Patent:US3315889


Patent:US 3315889
Title:Control Key Arrangement for a Calculator
Date:25.04.1967
Place:
Country:USA
Person:Thevis, Paul (P)
Company:Olympia (P)
Internal Links:Olympia RAS 4/15 (?)
Keywords:
Link to the patent office:
(without guarantee)
 US3315889 (espacenet),  US3315889 (uspto)


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Aus der Patentschrift US3315889