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This week in 1862 – Adolphe Nicole of Switzerland patented the chronograph — a timepiece that allows for split-second timing of sporting events.
In 1927 – The Hotel Statler in Boston, MA. became the first hotel to install radio headsets in each of its 1,300 rooms just 7 years after radio was born.
In 1928 – WGY-TV in Schenectady, NY began the first schedule of regular TV programs. WGY offered programming to the upstate New York audience three times a week using the mechanical scanning method.
In 1946 – Tokyo Telecommunications Engineering was founded with around 20 employees. Tokyo Telecommunications Engineering changed its name in 1958, to a much 
simpler, Sony.
And this week in 1975 – Sony introduced the Betamax videocassette recorder in Japan.