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File:Patent-GB-171154.pdf

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Original file(1,295 × 1,752 pixels, file size: 466 KB, MIME type: application/pdf, 6 pages)
Inventor

William P. De Witt

Assignee

William Price De Witt

Country

GB

Application N°

23159/20

Application Date

1920-08-06

Patent N°

171154

Brevettato

1921-11-07

Priorità

1920-04-19

Brand

De Witt-La France

Title

Improvements in pencil holders

Description

Matita meccanica

Riferimenti esterni

Informazioni

Brevetto per una matita meccanica. Stessa invenzione di nº US-1472962. Stessa invenzione di nº FR-526035. Stessa invenzione di nº DE-349147. Priorità dal brevetto statunitense.

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current23:00, 18 March 2014Thumbnail for version as of 23:00, 18 March 20141,295 × 1,752, 6 pages (466 KB)Piccardi (talk | contribs){{PatentInfo |Inventor=William P. De Witt |Assignee=William Price De Witt |Country=GB |ApplicationNum=23159/20 |ApplicationDate=1920-08-06 |PatentNum=171154 |PatentDate=1921-11-07 |PriorityDate=1920-04-19 |Titolo=Improvements in pencil holders |Marca=D...
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