File:Patent-US-1443399.pdf

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Original file ‎(1,159 × 1,704 pixels, file size: 214 KB, MIME type: application/pdf, 4 pages)

Dettagli

Inventor

Assegnatario

Assignee

Joseph Wallace

Country

US

Application N°

519254

Application Date

1921-12-01

Patent N°

1443399

Brevettato

1923-01-30

Priorità

1921-12-01

Brand

Inkograph

Title

Pencil

Description

Matita meccanica

Riferimenti esterni

Informazioni

Brevetto per la costruzione di una matita meccanica.

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Date/TimeThumbnailDimensionsUserComment
current19:06, 21 March 2021Thumbnail for version as of 19:06, 21 March 20211,159 × 1,704, 4 pages (214 KB)Piccardi (talk | contribs){{PatentInfo |Assignee=Joseph Wallace |Country=US |ApplicationNum=519254 |ApplicationDate=1921-12-01 |PatentNum=1443399 |PatentDate=1923-01-30 |PriorityDate=1921-12-01 |Titolo=Pencil |Marca=Inkograph |Descrizione=Matita meccanica }} ==Informazioni== Br...

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