File:Patent-CH-153221.pdf

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Brevetto per una matita meccanica multipla. Presenta un disegno aggiuntivo rispetto al brevetto tedesco. Stessa invenzione di nº DE-485584.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	23:34, 14 December 2013		1,295 × 1,752, 4 pages (271 KB)	Piccardi (talk \| contribs)	{{PatentInfo \|Assignee=Gebr. Fend G.m.b.H. \|Country=CH \|ApplicationNum=153221 \|ApplicationDate=1929-10-14 \|PatentNum=153221 \|PatentDate=1932-03-15 \|PriorityDate=1929-10-14 \|Titolo=Vierfarbstift \|Marca=Fend \|Descrizione=Matita meccanica multipla }} ==In...

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