1505060

Information

• Patent Grant
• 1505060

• References
• Source

• Patent Number

  1,505,060

• Date Filed

  Not available

• Date Issued

  Tuesday, August 12, 1924
  100 years ago

• CPC

  • E21D9/0607 - the shield being provided with devices for lining the tunnel
  • E21D11/07 - using brick- laying machines

• US Classifications

  • 405 - Hydraulic and earth engineering