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Patent:US1221829


Patent:US 1221829
Title:Adding Machine
Date:10.04.1917
Place:
Country:USA
Person:R. L. Burd
Company:Burroughs (P)
Internal Links:Burroughs, Burroughs Calculator (Klasse 5)
Keywords:
Link to the patent office:
(without guarantee)
 US1221829 (espacenet),  US1221829 (uspto)


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Aus der Patentschrift US1221829