2021313

Information

• Patent Grant
• 2021313

• References
• Source

• Patent Number

  2,021,313

• Date Filed

  Not available

• Date Issued

  Tuesday, November 19, 1935
  89 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