File:Patent-US-1989990.pdf
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Dettagli
| Inventor |
Charles R. Keeran |
|---|---|
| Assignee |
The Wahl Company |
| Country |
US |
| Application N° |
686482 |
| Application Date |
1933-08-24 |
| Patent N° |
1989990 |
| Brevettato |
1935-02-05 |
| Priorità |
1933-08-24 |
| Brand | |
| Title |
Fountain pen |
| Description |
Sistema di caricamento |
Riferimenti esterni
Informazioni
Brevetto per una variante di sistema di caricamento a sfiatatoio, una sorta di caricamento Vacumatic in la depressione viene creata con un meccanismo a torsione di un sacchetto di gomma.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:01, 25 July 2012 |  | 1,159 × 1,704, 4 pages (277 KB) | Piccardi (talk | contribs) | {{PatentInfo |Inventor=Charles R. Keeran |Assignee=The Wahl Company |Country=US |ApplicationNum=686482 |ApplicationDate=1933-08-24 |PatentNum=1989990 |PatentDate=1935-02-05 |PriorityDate=1933-08-24 |Titolo=Fountain pen |Marca=Eversharp |Descrizione=Sis... |
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