Keywords: Light-Emitting Diode (LED), on loan from Professor Nick Holonyak, United States, c. 1950 - Spurlock Museum, UIUC - DSC05949.jpg en Exhibit in the Spurlock Museum University of Illinois at Urbana-Champaign - Urbana-Champaign Illinois USA This work is in the public domain because it was published in the United States between 1923 and 1963 with its copyright not renewed 2015-06-14 16 14 53 own Daderot other versions PD-US-not renewed cc-zero Collections of the Spurlock Museum Light-emitting diodes Nick Holonyak |