File:Patent-US-1489590.pdf

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Brevetto per una matita meccanica.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	15:29, 14 April 2013		1,159 × 1,704, 4 pages (214 KB)	Piccardi (talk \| contribs)	{{PatentInfo \|Inventor=Herbert L. Carman \|Assignee=Mabie, Todd & Company \|Country=US \|ApplicationNum=392324 \|ApplicationDate=1920-06-28 \|PatentNum=1489590 \|PatentDate=1924-04-08 \|PriorityDate=1920-06-28 \|Titolo=Magazine pencil \|Marca=Swan \|Descrizione=...

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