inventionsJuly 6, 1920: Pilots Navigate Using AM RadioJune 28, 1846: Parisian Inventor Patents SaxophoneJune 24, 1812: Coal-Powered Locomotive Hauls CoalJune 21, 1948: Columbia's Microgroove LP Makes Albums Sound GoodJune 17, 1862: Worst Mashup Ever Has Farmers Tillin' 'n' Killin'Mashup Inventions: The Good, the Bad and the UglyJune 9, 1902: Put a Nickel In, Take Your Food OutJune 3, 1889: Power Flows Long-DistanceJune 1, 1495: King James Will Have a Scotch, Good SirMay 18, 1952: Carbon-14 Sets Stonehenge Date at 1848 B.C., More or LessMay 13, 1935: Enter the Parking MeterMay 12, 1936: Dvorak Patents KeyboardMay 11, 1951: RAM Is BornMay 6, 1953: The Heart-Machine Age BeginsMay 3, 1815: Blown Away by Horn With ValvesApril 29, 1882: Trackless Trolley Starts RollingApril 27, 1791: Samuel F.B. Morse, 'American Leonardo,' BornApril 21, 1987: Feds OK Patents for New Life FormsApril 15, 1452: It's the Renaissance, Man!April 9, 1860: Phonoautogram Records Sound, But Doesn't Reproduce ItApril 8, 1879: The Milkman Cometh ... With Glass BottlesApril 6, 1903: Edgerton Born, Father of High-Speed PhotographyMarch 23, 1857: Mr. Otis Gives You a LiftMarch 17, 1953: The Black Box Is BornMore Stories