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Patent:US2318591


Patent:US 2318591
Title:Apparatus calling for a material representation of numbers
Date:11.05.1943
Place:Brest, Finistere
Country:USA
Person:Pierre L. Couffignal
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2318591 (espacenet),  US2318591 (uspto)


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