radio patents and controversies

Aug 3, 2023 ... He used a spark gap attached to an induction coil and a separate spark gap on a receiving antenna. When waves created by the sparks of the coil ... The first radio was developed in the late 1800s. It took many years for radios to become public household items. There were several scientists involved in the ... Work began in earnest in the spring of 1954, and this first Regency transistor radio was in stores for the Christmas season later that year. The Regency ... In 1895, Guglielmo Marconi used radio waves to transmit signals over a distance of several kilometers. He developed the technology in subsequent years to ... Nov 7, 2008 ... On June 21, 1909, more than 10 years prior to the launching of America's first commercially licensed radio station, a young inventor named ... Experiments by Heinrich Rudolf Hertz between 1880 and 1890 proved the existence of electromagnetic waves. His successful work took place after earlier ... Jun 3, 2017 ... Commercial broadcasting didn't start until 1920, but the University of Wisconsin was experimenting with wireless transmission and in December ... Our company has achieved many milestones in its 85-plus year history. We ... In 1958 Motorola introduced the Motrac radio, the world's first vehicular ... May 26, 2020 ... Lamarr's path to inventing the cornerstone of Wi-Fi began when she heard about the Navy's difficulties with radio-controlled torpedoes. Mar 29, 2025 ... Where was radio invented? The first practical wireless radio ... Radio's early years. Reginald FessendenReginald ...