Business Notable Inventions By M.I.T. Grads October 21, 2010 / 1:24 PM EDT / CBS News Credit Cards (credit: Peter Macdiarmid/Getty Images) Doppler Radar Ethernet Cables Fax Machines (credit: Yoshikazu Tsuno/AFP/Getty Images) GPS Lego Mindstorm Rockefeller Center Rock and Roll Hall of Fame Spreadsheets Texas Instruments