2689917

Information

• Patent Grant
• 2689917

• References
• Source

• Patent Number

  2,689,917

• Date Filed

  Not available

• Date Issued

  Tuesday, September 21, 1954
  72 years ago

• CPC

  • G09F13/20 - with luminescent surfaces or parts
  • C09K11/025 - Use of non-luminescent materials other than binders
  • G02B6/0081 - Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides
  • G09F2013/1868 - Fluorescent pencil

• US Classifications

  • 250 - Radiant energy
  • 040 - Card, picture, or sign exhibiting