File:Patent-US-2028855.pdf

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Brevetto per una matita meccanica. Nelle immagini riportate in questo articolo il brevetto viene riportato su alcune matite meccaniche della Hicks.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	23:49, 7 June 2021		1,159 × 1,704, 7 pages (461 KB)	Piccardi (talk \| contribs)	{{PatentInfo \|Inventor=Arthur Winter \|Assignee=Arthur Winter \|Country=US \|ApplicationNum=743673 \|ApplicationDate=1934-09-12 \|PatentNum=2028855 \|PatentDate=1936-01-28 \|PriorityDate=1934-09-12 \|Titolo=Mechanical pencil \|Marca=Dictator \|Descrizione=Matit...

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