2755457

Information

• Patent Grant
• 2755457

• References
• Source

• Patent Number

  2,755,457

• Date Filed

  Not available

• Date Issued

  Tuesday, July 17, 1956
  68 years ago

• CPC

  • H03J1/04 - with optical indicating means
  • G01R13/402 - using active, i.e. light-emitting display devices
  • H01J31/14 - Magic-eye or analogous tuning indicators
  • H05B33/00 - Electroluminescent light sources
  • H05B33/26 - characterised by the composition or arrangement of the conductive material used as an electrode
  • Y10S116/35 - Electroluminescent dials

• US Classifications

  • 324 - Electricity: measuring and testing
  • 116 - Signals and indicators
  • 334 - Tuners
  • 340 - Communications: electrical