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Patent:US2261115


Patent:US 2261115
Title:Keyboard of calculating machines
Date:04.11.1941
Place:Nordstrandshogda, near Oslo
Country:USA
Person:Rolf Hofgaard
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2261115 (espacenet),  US2261115 (uspto)


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