3742446

Information

• Patent Grant
• 3742446

• References
• Source

• Patent Number

  3,742,446

• Date Filed

  Not available

• Date Issued

  Tuesday, June 26, 1973
  51 years ago

• CPC

  • G08B5/36 - using visible light sources
  • H02B15/04 - consisting of building blocks

• US Classifications

  • 340 - Communications: electrical