2572451

Information

• Patent Grant
• 2572451

• References
• Source

• Patent Number

  2,572,451

• Date Filed

  Not available

• Date Issued

  Tuesday, October 23, 1951
  73 years ago

• CPC

  • E01C9/10 - Steel gratings ; Gratings made of material other than steel
  • B64F1/20 - Arrangement of optical beacons

• US Classifications

  • 340 - Communications: electrical
  • 073 - Measuring and testing
  • 114 - Ships
  • 244 - Aeronautics and astronautics
  • 362 - Illumination
  • 404 - Road structure, process, or apparatus