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Patent:US3139964


Patent:US 3139964
Title:Color changing arrangement for a combined calculator and typewriter
Date:07.07.1964
Place:
Country:USA
Person:Felix Fischer
Company:Olympia Werke Ag
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US3139964 (espacenet),  US3139964 (uspto)


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Aus der Patentschrift US3139964