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Patent:US3526356


Patent:US 3526356
Title:Zero key locking arrangement for a ten key calculator
Date:01.09.1970
Place:Wilhelmshaven
Country:USA
Person:Hesse, Alfred; Braun, Gebhardt
Company:Olympia (P) Werke AG
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Keywords:
Link to the patent office:
(without guarantee)
 US3526356 (espacenet),  US3526356 (uspto)


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