File:Patent-CH-305143.pdf

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Brevetto per un caricamento a capillarità usato dalla Platignum (almeno a quanto risulta da questo foglietto di istruzioni, dove viene citato quello inglese). Priorità dal brevetto francese. Stessa invenzione di nº FR-1040173. Stessa invenzione di nº GB-732463. Stessa invenzione di nº BE-513137.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	00:07, 22 November 2021		1,296 × 1,754, 5 pages (288 KB)	Piccardi (talk \| contribs)	{{PatentInfo \|Inventor=Guy Frédéric Ringonaud \|Assignee=Guy Frédéric Ringonaud \|Country=CH \|ApplicationNum=305143 \|ApplicationDate=1952-07-28 \|PatentNum=305143 \|PatentDate=1955-02-15 \|PriorityDate=1951-07-27 \|Titolo=Porte-plume réservoir \|Marca=P...

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