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Patent:US2102700


Patent:US 2102700
Title:CALCULATING MACHINE OF THE TEN KEY TYPE
Date:21.12.1937
Place:Malmoe, Sweden
Country:USA
Person:Gustafsson, Ernst Valfrid and Hellgren, Gustaf Hilarius
Company:Aktiebolaget Facit (P)
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Link to the patent office:
(without guarantee)
 US2102700 (espacenet),  US2102700 (uspto)


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Aus der Patentschrift US2102700

Filing date: Nov 14, 1933