2646637

Information

• Patent Grant
• 2646637

• References
• Source

• Patent Number

  2,646,637

• Date Filed

  Not available

• Date Issued

  Tuesday, July 28, 1953
  71 years ago

• CPC

  • G02B6/0031 - Reflecting element, sheet or layer
  • G02B6/0041 - provided in the bulk of the light guide
  • G02B6/0046 - Tapered light guide
  • G02B6/005 - provided by one optical element, or plurality thereof, placed on the light output side of the light guide
  • G02B6/0068 - Arrangements of plural sources
  • G09F2013/1827 - Prismatic window
  • G09F2013/1831 - using more than one light source

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 359 - Optical: systems and elements