3670440

Information

• Patent Grant
• 3670440

• References
• Source

• Patent Number

  3,670,440

• Date Filed

  Not available

• Date Issued

  Tuesday, June 20, 1972
  52 years ago

• CPC

  • G09F21/12 - the advertising matter being towed by the aircraft
  • G09F21/06 - by aeroplanes, airships, balloons, or kites

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 428 - Stock material or miscellaneous articles