{"id":622124,"date":"2026-01-18T21:15:31","date_gmt":"2026-01-18T20:15:31","guid":{"rendered":"https:\/\/cronologia-universale.it\/1912-14\/"},"modified":"2026-01-18T21:15:31","modified_gmt":"2026-01-18T20:15:31","slug":"april-1900","status":"publish","type":"post","link":"https:\/\/cronologia-universale.it\/en\/april-1900\/","title":{"rendered":"April 1900"},"content":{"rendered":"<p>Guglielmo Marconi and his Wireless Telegraph and Signal Company obtain the famous patent 7777 for the frequency tuning of transmitting and receiving circuits. The frequency spectrum is discovered and used industrially, allowing for many simultaneous transmissions and receptions.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Guglielmo Marconi and his Wireless Telegraph and Signal Company obtain the famous patent 7777 for&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[35],"tags":[],"class_list":["post-622124","post","type-post","status-publish","format-standard","hentry","category-ev-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>April 1900 - Cronologia Universale<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cronologia-universale.it\/en\/april-1900\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"April 1900 - 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