1993414

Information

• Patent Grant
• 1993414

• References
• Source

• Patent Number

  1,993,414

• Date Filed

  Not available

• Date Issued

  Tuesday, March 5, 1935
  89 years ago

• CPC

  • B64C39/022 - Tethered aircraft
  • G09F21/14 - illuminated

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 116 - Signals and indicators
  • 244 - Aeronautics and astronautics