In snowy conditions, transportation authorities may require that snow chains or other traction aids be installed on vehicles, or at least supplied for them.
On 22 March 1925, one and a half years after the Great Kantō earthquake, Radio Japan produced the first radio broadcast in the country, transmitting from Atago Hill just north of the Tokugawa Tombs in Shiba Park.
Two of his key inventions — the first electric motor that ran at a constant speed under various loads and the self-propelled train car–led to the trolleys and later, to commuter trains.
1807 – Robert Fulton’s North River Steamboat leaves New York, New York for Albany, New York on the Hudson River, inaugurating the first commercial steamboat service in the world.
1843 – Tivoli Gardens, one of the oldest still intact amusement parks in the world, opens in Copenhagen, Denmark.1914 – The Panama Canal opens to traffic with the transit of the cargo ship SS Ancon.
1885 – Japan’s first patent is issued to the inventor of a rust-proof paint.
Milton Wright, father of Wilbur and Orville, was an itinerant churchman embroiled in controversies who bequeathed to his sons firmness of purpose, stubborn independence and overweening pride, qualities that were to inform their lives.
Sony’s cofounders, Masaru Ibuka and Akio Morita, met near the end of World War II.
* 1790 – The very first US patent is issued: to inventor Samuel Hopkins for a potash process.
After spending several years as assistant editor of Practical Wireless and Instrument Practice, Sinclair founded Sinclair Radionics in 1961, where he produced the first slim-line electronic pocket calculator in 1972 (the Sinclair Executive).