File:Patent-US-1712850.pdf

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Original file(1,159 × 1,704 pixels, file size: 410 KB, MIME type: application/pdf, 5 pages)
Inventor

Craig R. Sheaffer

Assignee

W. A. Sheaffer Pen Company

Country

US

Application N°

517173

Application Date

1921-11-23

Patent N°

1712850

Brevettato

1929-05-14

Priorità

1921-11-23

Brand

Sheaffer

Title

Pencil

Description

Matita meccanica

Riferimenti esterni

Informazioni

Brevetto per la costruzione di una matita meccanica.

File history

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Date/TimeThumbnailDimensionsUserComment
current16:46, 14 July 2012Thumbnail for version as of 16:46, 14 July 20121,159 × 1,704, 5 pages (410 KB)Piccardi (talk | contribs){{PatentInfo |Inventor=Craig R. Sheaffer |Assignee=W. A. Sheaffer Pen Company |Country=US |ApplicationNum=517173 |ApplicationDate=1921-11-23 |PatentNum=1712850 |PatentDate=1929-03-14 |PriorityDate=1921-11-23 |Titolo=Pencil |Marca=Sheaffer |Descrizione=...
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关于“Patent-US-1712850.pdf”的事实
Application date1921年11月23日 (三) +
Application number517173 +
Assigned toW. A. Sheaffer Pen Company +
Invented byCraig R. Sheaffer +
Patent date1929年5月14日 (二) +
Patent descriptionMatita meccanica +
Patent number1712850 +
Patent titlePencil +
Patented byW. A. Sheaffer Pen Company +
Patented inUS +
Priority date1921年11月23日 (三) +