1899474

Information

• Patent Grant
• 1899474

• References
• Source

• Patent Number

  1,899,474

• Date Filed

  Not available

• Date Issued

  Tuesday, February 28, 1933
  91 years ago

• CPC

  • E02D29/055 - further excavation of the cross-section proceeding underneath an already installed part of the structure

• US Classifications

  • 405 - Hydraulic and earth engineering