1836905

Information

• Patent Grant
• 1836905

• References
• Source

• Patent Number

  1,836,905

• Date Filed

  Not available

• Date Issued

  Tuesday, December 15, 1931
  93 years ago

• CPC

  • G09F13/30 - with moving light sources

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 315 - Electric lamp and discharge devices: systems
  • 340 - Communications: electrical