L’analisi dei registri dell’Ufficio Brevetti degli Stati Uniti a partire dal 1790 consente di studiare la natura dell’invenzione e come sia cambiata in 200 anni.
di The Physics arXiv Blog
L’analisi dei registri dell’Ufficio Brevetti degli Stati Uniti a partire dal 1790 consente di studiare la natura dell’invenzione e come sia cambiata in 200 anni.
di The Physics arXiv Blog
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