File:Patent-US-2217502.pdf

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Dettagli

Brevetto per la costruzione di una penna a stilo.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	16:04, 21 March 2021		1,159 × 1,704, 4 pages (236 KB)	Piccardi (talk \| contribs)	{{PatentInfo \|Assignee=Joseph Wallace \|Country=US \|ApplicationNum=327761 \|ApplicationDate=1940-04-04 \|PatentNum=2217502 \|PatentDate=1940-10-08 \|PriorityDate=1940-04-04 \|Titolo=Stylographic pen \|Marca=Inkograph \|Descrizione=Penna a stilo }} ==Informazio...

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