Patent:GB196589

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Patent:GB 196589
Title:Improvements in Slide Rules
Date:16.08.1923
Place:
Country:Great Britain
Person:
Company:A W Faber Castell (P) Bleistift Fa
Internal Links:Rechenschieber
Keywords:
Link to the patent office:
(without guarantee)
 GB196589 (http://v3.espacenet.com/textdoc?DB=EPODOC&F=0&IDX=GB196589)


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