1787595

Information

• Patent Grant
• 1787595

• References
• Source

• Patent Number

  1,787,595

• Date Filed

  Not available

• Date Issued

  Tuesday, January 6, 1931
  94 years ago

• CPC

  • G02B6/0036 - 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
  • G02B6/0068 - Arrangements of plural sources
  • G02B6/0091 - of the light source relative to the light guide
  • G02B6/0083 - Details of electrical connections of light sources to drivers, circuit boards, or the like
  • G02B6/0093 - Means for protecting the light guide
  • G09F2013/1836 - using a frame-like light source

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 340 - Communications: electrical