3831889

Information

• Patent Grant
• 3831889

• References
• Source

• Patent Number

  3,831,889

• Date Filed

  Not available

• Date Issued

  Tuesday, August 27, 1974
  50 years ago

• CPC

  • E01C9/10 - Steel gratings ; Gratings made of material other than steel
  • B64F1/36 - Other airport installations

• US Classifications

  • 244 - Aeronautics and astronautics