File:Patent-US-1989990.pdf

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Original file(1,159 × 1,704 pixels, file size: 277 KB, MIME type: application/pdf, 4 pages)
Inventor

Charles R. Keeran

Assignee

The Wahl Company

Country

US

Application N°

686482

Application Date

1933-08-24

Patent N°

1989990

Brevettato

1935-02-05

Priorità

1933-08-24

Brand

Eversharp

Title

Fountain pen

Description

Sistema di caricamento

Riferimenti esterni

Informazioni

Brevetto per una variante di sistema di caricamento a sfiatatoio, una sorta di caricamento Vacumatic in la depressione viene creata con un meccanismo a torsione di un sacchetto di gomma.

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current02:01, 25 July 2012Thumbnail for version as of 02:01, 25 July 20121,159 × 1,704, 4 pages (277 KB)Piccardi (talk | contribs){{PatentInfo |Inventor=Charles R. Keeran |Assignee=The Wahl Company |Country=US |ApplicationNum=686482 |ApplicationDate=1933-08-24 |PatentNum=1989990 |PatentDate=1935-02-05 |PriorityDate=1933-08-24 |Titolo=Fountain pen |Marca=Eversharp |Descrizione=Sis...
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关于“Patent-US-1989990.pdf”的事实
Application date1933年8月24日 (四) +
Application number686482 +
Assigned toThe Wahl Company +
Invented byCharles R. Keeran +
Patent date1935年2月5日 (二) +
Patent descriptionSistema di caricamento +
Patent number1989990 +
Patent titleFountain pen +
Patented byWahl Eversharp +
Patented inUS +
Priority date1933年8月24日 (四) +
Used for featureVacumatic filler +