3457558

Information

• Patent Grant
• 3457558

• References
• Source

• Patent Number

  3,457,558

• Date Filed

  Not available

• Date Issued

  Tuesday, July 22, 1969
  56 years ago

• CPC

  • H05B39/10 - Circuits providing for substitution of the light source in case of its failure
  • Y10T307/826 - Electrical
  • Y10T307/891 - Thermal relay

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 307 - Electrical transmission or interconnection systems
  • 340 - Communications: electrical