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Pagina principale
Patent:US3481452
| Brevetto: | US 3481452 |
| Titolo: | PICKIOS DRAFTSMAN KIT |
| Data: | 01.12.1969 |
| Luogo: | Jamaica (N.Y.) |
| Nazione: | Stati Uniti |
| Persona: | Anthony G. Pickios |
| Ditta: | |
| Link interni: | Fraction of an Inch Adding Machine and FractronCalculator.jpg |
| Keywords: | |
| Link al brevetto: (without guarantee) |  US3481452 (espacenet), US3481452 (uspto) |
In order for the draftsman to make convenient and quick conversions of the numerical fractions, such as half inch, quarter inch measurements, etc., to whole numbers, a fractional calculator may also be provided on the lower portion of the frame means