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)
Dettagli
| 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 | |
| Title |
Pencil |
| Description |
Matita meccanica |
Riferimenti esterni
Informazioni
Brevetto per la costruzione di una matita meccanica.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:46, 14 July 2012 |  | 1,159 × 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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