2591157

Information

• Patent Grant
• 2591157

• References
• Source

• Patent Number

  2,591,157

• Date Filed

  Not available

• Date Issued

  Tuesday, April 1, 1952
  73 years ago

• CPC

  • G09F21/16 - Sky-writing

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 239 - Fluid sprinkling, spraying, and diffusing
  • 244 - Aeronautics and astronautics
  • 392 - Electric resistance heating devices