3253274

Information

• Patent Grant
• 3253274

• References
• Source

• Patent Number

  3,253,274

• Date Filed

  Not available

• Date Issued

  Tuesday, May 24, 1966
  58 years ago

• CPC

  • G09G3/08 - using incandescent filaments
  • G08B5/36 - using visible light sources
  • G09F9/305 - being the ends of optical fibres

• US Classifications

  • 340 - Communications: electrical