1883970

Information

• Patent Grant
• 1883970

• References
• Source

• Patent Number

  1,883,970

• Date Filed

  Not available

• Date Issued

  Tuesday, October 25, 1932
  92 years ago

• CPC

  • G09F21/16 - Sky-writing

• US Classifications

  • 244 - Aeronautics and astronautics