File:Patent-US-1811992.pdf

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Brevetto per la costruzione di un rudimentale caricamento a cartuccia.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	20:38, 7 April 2021		1,159 × 1,704, 3 pages (141 KB)	Piccardi (talk \| contribs)	{{PatentInfo \|Inventor=Benjamin R. Bell \|Assignee=Benjamin R. Bell \|Country=US \|ApplicationNum=397973 \|ApplicationDate=1929-10-07 \|PatentNum=1811992 \|PatentDate=1931-06-30 \|PriorityDate=1929-10-07 \|Titolo=Fountain pen \|Marca=Unbranded \|Descrizione=Sist...

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