File:Patent-US-1909194.pdf

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Inventor	Assegnatario
Assignee	Joseph Wallace
Country	US
Application N°	540243
Application Date	1931-05-27
Patent N°	1909194
Brevettato	1933-05-16
Priorità	1931-05-27
Brand	Inkograph
Title	Fountain pen
Description	Sistema di visualizzazione del livello di inchiostro

Brevetto per la costruzione di un fondello trasparente per l'osservazione del livello di inchiostro.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	18:48, 21 March 2021		1,159 × 1,704, 3 pages (130 KB)	Piccardi (talk \| contribs)	{{PatentInfo \|Assignee=Joseph Wallace \|Country=US \|ApplicationNum=540243 \|ApplicationDate=1931-05-27 \|PatentNum=1909194 \|PatentDate=1933-05-16 \|PriorityDate=1931-05-27 \|Titolo=Fountain pen \|Marca=Inkograph \|Descrizione=Sistema di visualizzazione del li...

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