2821800

Information

• Patent Grant
• 2821800

• References
• Source

• Patent Number

  2,821,800

• Date Filed

  Not available

• Date Issued

  Tuesday, February 4, 1958
  66 years ago

• CPC

  • G02B6/0021 - for housing at least a part of the light source
  • G02B6/0036 - 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
  • G02B6/0083 - Details of electrical connections of light sources to drivers, circuit boards, or the like
  • H03J1/044 - Illumination of the tuning dial; On and off switching of the illumination; Circuits related with illumination
  • G02B6/0091 - of the light source relative to the light guide
  • Y10S116/36 - Illuminated dial and pointer

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 116 - Signals and indicators
  • 362 - Illumination