The Google doodle has marked the 110th anniversary of the birth of Dennis Gabor, the Nobel Prize winner who invented holography. The Hungarian-born electrical engineer won the Nobel Prize for Physics in 1971 for the invention - a system of lensless, three-dimensional photography that has many applications. In 1949 Gabor joined the faculty of London's Imperial College of Science and Technology. In 1958 he became professor of applied electron physics. His other work included research on high-speed oscilloscopes, communication theory, physical optics, and television. Gabor was awarded more than 100 patents.