Freebase(0.00 / 0 votes)Rate this definition: Campestre is a municipality located in the south of the Brazilian state of Minas Gerais. Its population is 24,481 and its area is 54 kmÂ².
Also, there was Philo Farnsworth, a west-coast inventor whose first demonstration of television was in 1927. Like Baird's system, it was electro-mechanical, but by 1929 he had eliminated the moving parts of his system to create the world's first fully electronic system.
It was more than a decade before televisions were made and sold commercially. In 1939, RCA began producing a commercially viable product and this represented the first widely available television. In the UK, broadcasting began in 1929 using John Logie Baird's electro-mechanical system first demonstrated in 1925.