Find an Orthopedic Specialist Near You. However, behind knee pain may be a symptom of deep vein thrombosis (blood clot in the leg), which is a serious and life-threatening condition. The blood clot can break loose and cause a pulmonary embolism in the lung, a heart attack, or even stroke. Deep vein thrombosis has similar symptoms to a Bakerâs cyst.
Baird was a Scottish engineer and inventor of the world's first working television system in Hastings, England, in 1923. His public demonstration subsequently took place in Selfridges, a department store in London England, during March 1925.
Quick Answer. According to the Grolier Encyclopedia, the electronic television was successfully displayed for the first time on Sept. 7, 1927 in San Francisco. This predecessor of the modern television was invented by Philo Taylor Farnsworth, a 21-year-old Utah native.