Science Inventions By victor.cardona Nov 20, 1877 Thomas Alba edinson and its phonograph Apr 9, 1900 Lp 78 rpm is invented Aug 13, 1901 Radio Radio Transmission developed by G. Marconni. Aug 25, 1910 Headphones invented by Nathaniel Baldwin Aug 5, 1923 Traffic lights invented by Garret Morgan Feb 21, 1925 Loud speakers invented by Edward Kellogg Sep 28, 1928 Alexander Fleming discovers penecillin Jun 15, 1935 Ballpoint pen invented by Laszlo Biro Aug 9, 1945 Atomic bomb Sep 25, 1948 33 rpm Lp is invented Jul 26, 1949 45 rpm is created Jan 1, 1954 Firts T.V. color Jun 1, 1963 Compact casette is created. Apr 28, 1967 First hand calculator is invented Apr 4, 1971 Mobile Phone invented by Dr. Martin Cooper. Oct 27, 1979 Sony releases portable casette player. Aug 17, 1982 Cd. is invented Nov 30, 1995 DVD is invented Nov 1, 2001 Ipod
