3690388

Information

• Patent Grant
• 3690388

• References
• Source

• Patent Number

  3,690,388

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1972
  52 years ago

• CPC

  • E02D3/106 - by forming sand drains containing only loose aggregates

• US Classifications

  • 175 - Boring or penetrating the earth
  • 405 - Hydraulic and earth engineering