1829 is the birthday of the coffee grinder. On this day Englishman James Carrington received a patent for a machine that grinds coffee beans
1879 - Sofia is proclaimed the capital of Balgaria
1885 - German inventor Gottlieb Daimler received a patent for his first engine - a half horsepower engine
1973 - Motorola employee Martin Cooper made the first public call from a mobile phone
1981 - The world's first portable computer was unveiled at the West Coast Computer Fair
2010 - The first-generation iPad went on sale in the US
