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Individual
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Individual
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Priority to ES4542ApriorityCriticalpatent/ES4542A1/en
Publication of ES4542A1publicationCriticalpatent/ES4542A1/en
ES4542A1884-10-111884-10-11
An apparatus by means of which parallel or convergent movements applicable to the drawing of lines are given to a ruler.
ExpiredES4542A1
(en)