1451840

Information

• Patent Grant
• 1451840

• References
• Source

• Patent Number

  1,451,840

• Date Filed

  Not available

• Date Issued

  Tuesday, April 17, 1923
  101 years ago

• CPC

  • E21D11/34 - Joints between vertical props and horizontal top bars
  • Y10T403/3921 - Arcuate or multiplanar side

• US Classifications

  • 403 - Joints and connections
  • 248 - Supports
  • 405 - Hydraulic and earth engineering