2223409

Information

• Patent Grant
• 2223409

• References
• Source

• Patent Number

  2,223,409

• Date Filed

  Not available

• Date Issued

  Tuesday, December 3, 1940
  84 years ago

• CPC

  • G02B6/0091 - of the light source relative to the light guide
  • G02B6/0036 - 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
  • G02B6/0043 - provided on the surface of the light guide
  • G02B6/005 - provided by one optical element, or plurality thereof, placed on the light output side of the light guide
  • G02B6/006 - to produce indicia, symbols, texts or the like
  • G09F2013/185 - Embossed marks
  • G09F2013/1877 - Stand-like

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 106 - Compositions: coating or plastic