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Patent:US2892266


Patent:US 2892266
Title:Calculator keyboard simulator for training purposes
Date:30.06.1959
Place:
Country:USA
Person:Tomkins John A
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2892266 (espacenet),  US2892266 (uspto)


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Aus der Patentschrift US2892266