Patent:CH123004

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Patent:CH 123004
Title:Rechenmaschine fuer den Elementarunterricht.
Date:17.10.1927
Place:Deutschland
Country:Switzerland
Person:
Company:
Internal Links:Kugelrechner, Lehrmittel
Keywords:
Link to the patent office:
(without guarantee)
 CH123004 (http://v3.espacenet.com/textdoc?DB=EPODOC&F=0&IDX=CH123004)


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