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Patent:US951982


Patent:US 951982
Title:Calculating-machine
Date:15.03.1910
Place:Glashütte und Dresden
Country:USA
Person:Burkhardt, Arthur (P)
Company:AG vorm. Seidel & Naumann
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Link to the patent office:
(without guarantee)
 US951982 (espacenet),  US951982 (uspto)


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