1823757

Information

• Patent Grant
• 1823757

• References
• Source

• Patent Number

  1,823,757

• Date Filed

  Not available

• Date Issued

  Tuesday, September 15, 1931
  93 years ago

• CPC

  • E21D11/08 - with preformed concrete slabs
  • E21D11/07 - using brick- laying machines

• US Classifications

  • 405 - Hydraulic and earth engineering