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Rogers Communications () is a diversified public Canadian communications and media company. It operates particularly in the field of wireless communications, cable television, telephone, and Internet connectivity with significant additional telecommunications and mass media assets. The company is headquartered at 333 Bloor Street East in Toronto, Ontario.〔"(Contact Us Mail or Fax )." Rogers Communications. Retrieved on November 22, 2013.〕 The company claims the heritage of the Rogers Vacuum Tube Company, founded in 1925 by Edward Rogers, which started the CFRB radio station in Toronto, which was later acquired by outside interests. The present enterprise dates to 1960, when Rogers' son, Ted Rogers, founded Rogers Radio Broadcasting Ltd. That company acquired CHFI that year,〔(【引用サイトリンク】title=History of Rogers )〕 as well as Aldred-Rogers Broadcasting, a partnership with Joel Aldred which helped launch CFTO in 1961. Rogers later bought out Aldred and started the current cable and wireless operations, known as Rogers Cablesystems Ltd. The chief competitor to the company is Bell Canada, which has a similarly extensive portfolio of radio and television media assets, as well as wireless, television distribution, and telephone services, particularly in Eastern and Central Canada; the two companies are often seen as having a duopoly on communications services in their regions as both companies own a stake of Maple Leaf Sports and Entertainment. However, the company also competes nationally with Telus for wireless services, and primarily indirectly with Shaw Communications for television service. However, Rogers and Shaw have since launched an online movie and television streaming service called 'Shomi'. Rogers is an official Canadian media, exclusive rightsholder and partner of the National Hockey League. ==History== In 1925, Rogers Sr. invented the world's first alternating current (AC) heater filament cathode for a radio tube, which then enabled radios to be powered by ordinary transformer-coupled household electric current. This was a breakthrough in the technology and became a key factor in popularizing radio reception. After this invention radios became far more commonplace in the world. The All American Five is an example of a vacuum tube radio that utilized five tubes with heater filaments series-connected to produce a total AC voltage demand that matched the 120 volts AC supplied at the wall socket. No power transformers were needed in these radios In 1931, Rogers Sr. was awarded an experimental television licence in Canada. He was working on radar when, on May 6, 1939 he died suddenly due to complications of a hemorrhage. He was 38 years old. He left a widow, Velma, and a five-year-old son, Edward (Ted Rogers). While his business interests were sold, his son later determined to carry on his father's business. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rogers Communications」の詳細全文を読む スポンサード リンク
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