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Patent:US1732231


Patent:US 1732231
Title:Keyboard for calculating machines
Date:22.10.1929
Place:
Country:USA
Person:Horton, Allen (P)
Company:Burroughs (P)
Internal Links:Tastatur
Keywords:
Link to the patent office:
(without guarantee)
 US1732231 (espacenet),  US1732231 (uspto)


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Aus der Patentschrift US1732231