File:Patent-US-1920770.pdf
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Original file (1,159 × 1,704 pixels, file size: 328 KB, MIME type: application/pdf, 5 pages)
Dettagli
| Inventor |
Ivan D. Tefft, Kenneth S. Parker |
|---|---|
| Assignee |
The Parker Pen Company |
| Country |
US |
| Application N° |
542030 |
| Application Date |
1931-06-04 |
| Patent N° |
1920770 |
| Brevettato |
1933-08-01 |
| Priorità |
1931-06-04 |
| Brand | |
| Title |
Mechanical pencil |
| Description |
Matita meccanica |
Riferimenti esterni
Informazioni
Brevetto per una matita meccanica.
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:10, 31 July 2012 |  | 1,159 × 1,704, 5 pages (328 KB) | Piccardi (talk | contribs) | {{PatentInfo |Inventor=Ivan D. Tefft, Kenneth S. Parker |Assignee=Parker Pen Company |Country=US |ApplicationNum=542030 |ApplicationDate=1931-06-04 |PatentNum=1920770 |PatentDate=1933-08-01 |PriorityDate=1931-06-04 |Titolo=Mechanical pencil |Marca=Park... |
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