2347665

Information

• Patent Grant
• 2347665

• References
• Source

• Patent Number

  2,347,665

• Date Filed

  Not available

• Date Issued

  Tuesday, May 2, 1944
  80 years ago

• CPC

  • G02B6/0061 - to provide homogeneous light output intensity
  • F21S8/00 - Lighting devices intended for fixed installation
  • G02B6/0065 - Manufacturing aspects; Material aspects
  • G02B6/0021 - for housing at least a part of the light source
  • G02B6/0036 - 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
  • G02B6/0046 - Tapered light guide
  • G02B6/0055 - Reflecting element, sheet or layer
  • G09F2013/1813 - provided with a coating showing a pattern of dots of variable density
  • G09F2013/1827 - Prismatic window

• US Classifications

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