File:Patent-US-1437180.pdf

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Original file(1,159 × 1,704 pixels, file size: 143 KB, MIME type: application/pdf, 3 pages)
Inventor

Ernest E. Hill

Assignee

The Wahl Company

Country

US

Application N°

431174

Application Date

1920-12-16

Patent N°

1437180

Brevettato

1922-11-28

Priorità

1920-12-16

Brand

Eversharp

Title

Mechanical pencil

Description

Matita meccanica

Riferimenti esterni

Informazioni

Brevetto per il meccanismo di una matita meccanica.

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current17:52, 24 July 2012Thumbnail for version as of 17:52, 24 July 20121,159 × 1,704, 3 pages (143 KB)Piccardi (talk | contribs){{PatentInfo |Inventor=Ernest E. Hill |Assignee=The Wahl Company |Country=US |ApplicationNum=431174 |ApplicationDate=1920-12-16 |PatentNum=1437180 |PatentDate=1922-11-28 |PriorityDate=1920-12-16 |Titolo=Mechanical pencil |Marca=Eversharp |Descrizione=M...
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Fatti riguardanti Patent-US-1437180.pdf
Application datedicembre 16, 1920 +
Application number431174 +
Assigned toThe Wahl Company +
Invented byErnest E. Hill +
Patent datenovembre 28, 1922 +
Patent descriptionMatita meccanica +
Patent number1437180 +
Patent titleMechanical pencil +
Patented byWahl Eversharp +
Patented inUS +
Priority datedicembre 16, 1920 +