Patent:DRGM639849

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Patent:DR GM639849
Title:cylindrical slide rule
Date:13.11.1915
Place:Reichenbach i.Vogtland
Country:German Reich
Person:Tröger, Emil
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 DRGM639849 (http://v3.espacenet.com/textdoc?DB=EPODOC&F=0&IDX=DRGM639849)


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