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Patent:US2237149


Patent:US 2237149
Title:Tabulating machine
Date:01.04.1941
Place:Berlin
Country:USA
Person:Kölm, Ulrich M.W.
Company:IBM (P)
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2237149 (espacenet),  US2237149 (uspto)


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