3808721

Information

• Patent Grant
• 3808721

• References
• Source

• Patent Number

  3,808,721

• Date Filed

  Not available

• Date Issued

  Tuesday, May 7, 1974
  50 years ago

• CPC

  • G09F13/30 - with moving light sources
  • G09F19/12 - using special optical effects

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 362 - Illumination