1497583

Information

• Patent Grant
• 1497583

• References
• Source

• Patent Number

  1,497,583

• Date Filed

  Not available

• Date Issued

  Tuesday, June 10, 1924
  100 years ago

• CPC

  • E03F5/02 - Manhole shafts or other inspection chambers snow-filling openings accessories
  • F16L41/028 - of concrete, cement or asbestos-cement

• US Classifications

  • 052 - Static structures