2520198

Information

• Patent Grant
• 2520198

• References
• Source

• Patent Number

  2,520,198

• Date Filed

  Not available

• Date Issued

  Tuesday, August 29, 1950
  74 years ago

• CPC

  • G08B5/36 - using visible light sources
  • G08B9/00 - Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user

• US Classifications

  • 340 - Communications: electrical