File:Patent-FR-570444.pdf

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Brevetto per una matita meccanica. Stessa invenzione di nº GB-220435.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	23:57, 14 December 2013		1,295 × 1,752, 3 pages (157 KB)	Piccardi (talk \| contribs)	{{PatentInfo \|Inventor=Karl Fend \|Assignee=Karl Fend \|Country=FR \|ApplicationNum=570444 \|ApplicationDate=1923-07-28 \|PatentNum=570444 \|PatentDate=1924-04-30 \|PriorityDate=1923-07-28 \|Titolo=Porte-mine \|Marca=Fend \|Descrizione=Matita meccanica }} ==Info...

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