File:Patent-US-1943048.pdf

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Brevetto per la costruzione di una sezione trasparente per l'osservazione del livello di inchiostro. Riferimenti a nº US-1907626.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	13:49, 21 March 2021		1,159 × 1,704, 4 pages (207 KB)	Piccardi (talk \| contribs)	{{PatentInfo \|Assignee=Joseph Wallace \|Country=US \|ApplicationNum=655022 \|ApplicationDate=1933-02-03 \|PatentNum=1943048 \|PatentDate=1934-01-09 \|PriorityDate=1933-02-03 \|Titolo=Fountain pen \|Marca=Unbranded \|Descrizione=Finestra trasparente }} ==Informa...

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