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{#concept: [[Category:Patents]] [[Patent date::≥1/1/1881]][[Patent date::≤31/12/1881]]
| Patents registered in 1881
}
Creata pagina con " {#concept: Category:Patents Patent date::≥1/1/1881Patent date::≤31/12/1881 | Patents registered in 1881 }"
{#concept: [[Category:Patents]] [[Patent date::≥1/1/1881]][[Patent date::≤31/12/1881]]
| Patents registered in 1881
}