Primary headaches. A primary headache is caused by overactivity of or problems with pain-sensitive structures in your head. A primary headache isn't a symptom of an underlying disease. Chemical activity in your brain, the nerves or blood vessels surrounding your skull, or the muscles of your head and neck (or some combination of these factors) can play a role in primary headaches.
The first flat screen TV was invented in July 1964 by a team at the University of Illinois. ... That year, LCD screens were sold in sizes up to 42 inches.
It was in June of 1956, that the practical television remote controller first entered the American home. However, as far back as 1893, a remote control for television was described by Nikola Tesla in U.S. Patent 613809.The Germans used remote control motorboats during WWI.he first Space Command units were expansive due to the necessary use of six vacuum tubes in the receiver units that raised the price of a television by thirty percent. In the early 1960s, after the invention of the transistor, remote controls came down in price, and in size, as did all electronics.