Translations:Zerollo/1/en
Versione del 31 mar 2014 alle 18:59 di Piccardi (discussione | contributi) (Creata pagina con "{{Infobox_Brand|Zerollo}}</noinclude>The Zerollo was founded in 1932 by ''David Dante Zerollo ''<ref>it seems however, that he was already active in the fields of mech...")
| Zerollo |
|---|
| Brand advertising |
| Brand photos |
| Instructions sheet |
| Patents |
The Zerollo was founded in 1932 by David Dante Zerollo [1] in Genoa for the production of one of the most original ever made pens, equipped by special telescopic system that allowed alternating between two different pens contained in a single body, estracting either one and then the other.[2] The pen was protected, according to the manufacturer, by patents obtained from all over the world, but the only known are the U.S. Patent nº US-1893130 required in 1930 in Italy, in 1931 in the U.S.A. and awarded in 1933, the British patent nº GB-397736, approved August 31 , 1933 and the French patent nº FR-728038.[3]
- ↑ it seems however, that he was already active in the fields of mechanics applied to the stationety, holding a patent (nº US-1790037) for and automatic letters sealer, assigned intp the U.S. in 1931 but applied since January 1929 in Germany.
- ↑ the idea of a double pen however is not so original, it appeared already in a 1912 patent (nº US-1020221).
- ↑ in patents are cited as inventors Chelazzi Mirko and Dino Frulli, presumably Zerollo employees.