2149232

Information

• Patent Grant
• 2149232

• References
• Source

• Patent Number

  2,149,232

• Date Filed

  Not available

• Date Issued

  Tuesday, February 28, 1939
  85 years ago

• CPC

  • E21D11/20 - Special cross- sections
  • E21D5/11 - with combinations of different materials

• US Classifications

  • 405 - Hydraulic and earth engineering